Lithium Storage Capacity Research Articles

The Microparticles SiOx Loaded on PAN-C Nanofiber as Three-Dimensional Anode Material for High-Performance Lithium-Ion Batteries

Three-dimensional C/SiOx nanofiber anode was prepared by polydimethylsiloxane (PDMS) and polyacrylonitrile (PAN) as precursors via electrospinning and freeze-drying successfully. In contrast to conventional carbon covering Si-based anode materials, the C/SiOx structure is made up of PAN-C, a 3D carbon substance, and SiOx loading steadily on PAN-C. The PAN carbon nanofibers and loaded SiOx from pyrolyzed PDMS give increased conductivity and a stable complex structure. When employed as lithium-ion batteries (LIBs) anode materials, C/SiOx-1% composites were discovered to have an extremely high lithium storage capacity and good cycle performance. At a current density of 100 mA/g, its reversible capacity remained at 761 mA/h after 50 charge-discharge cycles and at 670 mA/h after 200 cycles. The C/SiOx-1% composite aerogel is a particularly intriguing anode candidate for high-performance LIBs due to these appealing qualities.

Achieving ultrastability and efficient lithium storage capacity with high-energy iron(II) oxalate anode materials by compositing Ge nano-conductive sites.

Transition metal oxalates (TMOxs, represented by iron oxalate) have attracted considerable interest in anode materials due to their excellent lithium storage properties and consistent cyclic performance. Although investigations into their electrochemical capabilities and lithium storage mechanisms are gradually deepening, the complex and varied electrochemical reactions in the initial cycle, poor inherent conductivity, and high irreversible capacity constrain their further development. Herein, to solve the above-mentioned problems, we controlled the hydrothermal synthesis conditions of iron oxalate with the assistance of organic solvents, which induced the growth of iron oxalate crystals with nano Ge metal as the core. The metal Ge space sites compounded to the stacked iron oxalate particles act as conductive nodes and metal frames, which enhances both the strength of iron oxalate samples and electronic conductivity and lithium-ion diffusion inside the electrode materials. This special structure enhances the electrochemical activity of iron oxalates and improves their lithium storage capability. The iron oxalate @ nano Ge metal composite (FCO@Ge-1) exhibits an excellent cycling performance and an appreciable reversible specific capacity (1090 mA h g-1 after 200 cycles at 1 A g-1). The obvious polarization and variation of the electrochemical reaction in the initial cycle of iron oxalate are reduced by compositing nano Ge metal. It is demonstrated that nano Ge metal can promote reversible capacity retention from 67.72% to 80.69% in the early cycles. The distinctive structure of iron oxalate @ nano Ge metal composite provides a fresh pathway to enhance oxalate electrochemical reversible lithium storage activity and develop high-energy electrode material by constructing composite space conductive sites.

Functionalized two-dimensional iron boride compounds as novel electrode materials in Li-ion batteries.

MBenes, a class of two-dimensional metal borides, have emerged as a cutting-edge research frontier and a hotspot for electrode materials in ion batteries. This work presents a systematic investigation of the performance of two-dimensional iron boride (FeB) as an electrode material for lithium-ion batteries (LIBs), utilizing first-principles calculations. The results indicate that FeB exhibits remarkable structural stability and excellent conductivity, making it an extremely promising electrode material for LIBs. FeB has the capability to adsorb a monolayer of Li atoms, and exhibits a maximum theoretical capacity of 364 mA h g-1, a high average open circuit voltage (OCV) of 1.08 V, and a low diffusion barrier energy of 0.24 eV. Through the investigation of electrochemical properties of functionalized FeB, it has been discovered that surface functionalization exerts a positive impact on lithium storage. Theoretical lithium storage capacities of FeBT (T = F, O and S) are 538 mA h g-1, 555 mA h g-1 and 476 mA h g-1, respectively. However, the introduction of F and O functional groups significantly reduces diffusion barriers to 0.081 eV and 0.036 eV, respectively, while the introduction of the S functional group markedly decreases the average OCV to approximately 0.25 V. These interesting findings suggest that FeB has great potential in the future development of LIBs.

Structure-Performance relationship guided design and strategic synthesis of lithiated oxa-graphene for high lithium storage

Graphene derivative materials are widely used as anode component in lithium-ion batteries. However, there is still a lack of reliable and foresighted guides helpful for designing high-performance graphene-based electrode materials. To this end, we strategically chose challenging graphite fluoride as starting material for the derivatization of graphene in order to exclude interference factors. As a result, graphene framework was functionalized with oxygen-containing carboxylate and sulfonate groups and oxygen-free aniline units at a similar functionalization degree. Due to the strong effect of lithiation, out-of-plane p-aminobenzoic acid blocks boosted the lithium-storage capacity of graphene matrix to 636 mAh g−1 at 0.1 A/g, and sulfanilic acid blocks maximized this value to 873 mAh g−1. Sadly, oxygen-free aniline functionalized graphene material only delivered a specific capacity of 88 mAh g−1. Meanwhile, spatial lithiated carboxylate and sulfonate units endowed graphene framework with better rate capability and cycling stability. Such a structure-performance relationship established herein was beneficial for the design and preparation of high-performance graphene derivative electrode materials.

Overall Carbon-neutral Electrochemical Reduction of CO2 in Molten Salts using a Liquid Metal Sn Cathode.

An overall carbon-neutral CO2 electroreduction requires enhanced conversion efficiency and intensified functionality of CO2-derived products to balance the carbon footprint from CO2 electroreduction against fixed CO2. A liquid Sn cathode is herein introduced into electrochemical reduction of CO2 in molten salts to fabricate core-shell Sn-C spheres (Sn@C). An in-situ generated Li2SnO3/C directs a self-template formation of Sn@C. Benefitting from the accelerated reaction kinetics from the liquid Sn cathode and the core-shell structure of Sn@C, a CO2-fixation current efficiency higher than 84% and a high reversible lithium-storage capacity of Sn@C are achieved. The versatility of this strategy is demonstrated by other low melting point metals, such as Zn and Bi. This process integrates energy-efficient CO2 conversion and template-free fabrication of value-added metal-carbon, achieving an overall carbon-neutral electrochemical reduction of CO2.

Facile Synthesis of Nb-Doped CoTiO3 Hexagonal Microprisms as Promising Anode Materials for Lithium-Ion Batteries

Bimetallic oxides are demonstrated to show better electrochemical performance than single transition metal oxides. Recently, ilmenite-type transition metal titanate (MTiO3, M = Fe, Co, Ni, etc.) is emerging as a promising anode for lithium-ion batteries (LIBs) due to its comparable theoretical capacity and small volumetric change during cycling. However, the practical electrochemical performance is still harmed by its poor electronic conductivity. Herein, for the first time, a Nb-doping strategy is adopted to modify CoTiO3 hexagonal microprisms by a facile solvothermal method combined with an annealing treatment. Benefiting from the unique 1D morphology and the ameliorated conductivities induced by Nb-doping, the optimized Nb-doped CoTiO3 anode exhibits an improved lithium-storage capacity of 233 mA h g−1 at 100 mA g−1 after 100 cycles and excellent rate capability, which are superior to that of pure CoTiO3. This work sheds light on the potential application of titanium containing bimetallic oxide in the next-generation advanced rechargeable LIBs.

Local structure transformations promoting high lithium diffusion in defect perovskite type structures

Defect perovskites, AxBO3 such as (Li3xLa2/3-x)TiO3, are attracting attention as high capacity electrodes in lithium-ion batteries. However, the mechanism enabling high lithium storage capacities has not been fully investigated. In this work, the reversible insertion and removal of lithium up to an average A-site cavity occupancy of 1.71 in the defect perovskite (Li0.18Sr0.66)(Ti0.5Nb0.5)O3 is investigated. It was shown that subtle lithium reorganization during lithiation has a significant impact on enabling high capacity. Contrary to previous studies, lithium was coordinated to triangular faces of Ti/Nb oxygen octahedra and offset from O4 windows between A-site cavities in the as-synthesised material. Upon electrochemical lithiation Li-Li repulsion redistributes of all the lithium towards the O4 window position resulting in a loss of lithium mobility. Surprisingly, the mobility is regained during over-lithiation and following multiple electrochemical cycles. It is suggested that lithium reorganisation into the center of the O4 window alleviates the Li-Li repulsion and modifies the diffusion behavior from site percolation to bond percolation. The results obtained provide valuable insight into the chemical drivers enabling higher capacities and enhanced diffusion in defect perovskites. More broadly the study delivers fundamental understanding on the non-equilibrium structural transformations occurring within electrode materials during repeated electrochemical cycles.

Ni-decorated Sn(HPO4)2 anchored on reduced graphene oxide boosting initial Coulombic efficiency and cyclic stability for lithium-ion batteries

Layered Sn(HPO4)2 with perfect crystal structure and large interlayer spacing shows considerable lithium storage capacity worthy of study, but its intrinsic poor conductivity and low initial Coulombic efficiency (ICE) as anode material for lithium-ion batteries need to be enhanced. Herein, Sn(HPO4)2 is first decorated by Ni nanoparticles through electroless plating, then anchored on reduced graphene oxide (rGO). The well-conductive Ni nanoparticles distributed uniformly on the surface of Sn(HPO4)2 can help to inhibit the irreversible sites on the surface and reduce electrochemical kinetic impedance, thus the Ni/Sn(HPO4)2 anode exhibits improved ICE and capacity retention ratios, which are almost twice that of bare Sn(HPO4)2 anode. Meanwhile, the conductive network formed by rGO in rGO/Ni/Sn(HPO4)2 composite not only weakens the electrochemical reaction polarization, but also keeps the electrode structure stable and provides extra lithium storage sites, so rGO/Ni/Sn(HPO4)2 anode delivers higher ICE of 60.29%, superior cyclic stability of 79.7% capacity retention after 120 cycles with at 0.1 A g−1.

Micron SiOx encapsulated into amorphous B, N Co-doped carbon nanotube network for high-capacity and long-durable Li-ion half/full batteries

Micron silicon suboxide (m-SiOx) with low-cost and advantageous capacity has been proposed as a prospective candidate for lithium-ion battery anodes, yet huge volumetric fluctuation and poor inherent conductivity should be addressed urgently. Herein, encapsulation of m-SiOx particles into amorphous B, N co-doped carbon nanotube network (SSBCN) via metal cation-assisted carbonization is shown. Rational preparation process enables in-situ synthesis of 3D porous carbon nanotubes network around m-SiOx, guaranteeing slight volume variation during cycling, effective electrical contact, fast electron and Li-ion transfer and speedy electrolyte penetration. In-situ Raman spectra confirm the additional utilization rate of m-SiOx. Heteroatomic active sites (Sn, N, B) further enhance lithium storage capacity. As anodes in half batteries, the SSBCN exhibits ultrahigh reversible capacities of 2072.8 mAh/g at 0.1 A/g, excellent rate performance of 501.8 mAh/g at 10 A/g and prominent long-term cycle stability of 400 and 1000 cycles at 1 and 5 A/g, respectively. Moreover, SSBCN//LiFePO4 (LFP) full batteries also display remarkable cycle durability with a 92.72% capacity retention after 600 cycles at 1C. This work outperforms most of the recently reported SiOx-based anodes and renders a new opportunity of m-SiOx in high-performance LIBs.

Two-dimensional black phosphorus modified by aluminum element: A feasible way to enhance lithium storage performance

• The maximum lithium storage capacity of Al-2D-BP is 46% higher than that of 2D-BP. • Al-2D-BP has higher capacity retention than 2D-BP after 100 cycles. • The mechanism of lithium storage in Al-2D-BP is mainly diffusion-controlled. Two-dimensional black phosphorus (2D-BP) has attracted much attention in electrochemical lithium storage due to its special wrinkled structure and great theoretical capacity, and it is a two-dimensional energy storage material with great application potential. However, the low electronic conductivity of phosphorus-based materials also greatly limits their application and development. In order to improve the lithium storage performance of 2D-BP, it was modified by the high electron mobility of aluminum element using hydrothermal synthesis method in this study, and the material morphology and chemical composition were investigated through a series of physical characterization, while the long cycling and rate performance tests also showed that the electrode has superior lithium storage capacity and cycling stability, thus proving the feasibility of this scheme. It lays a theoretical and practical foundation for the future research of 2D-BP in lithium storage and promotes the practical application of 2D-BP in this field in the future.

Microstructure Engineered Silicon Alloy Anodes for Lithium‐Ion Batteries: Advances and Challenges

AbstractDue to the high theoretical lithium storage capacity and moderate voltage platform, silicon is expected to substitute graphite and serves as the most promising anode material for lithium‐ion batteries (LIBs). However, substantial volume change during cycling subjects the silicon anode to electrode pulverization and conductive network damage, extensively limiting its commercial purpose. Strategies, such as alloying, nano‐crystallization, and compositing, are developed against these problems. This review introduces the attractive alloying modification method and summarizes the recent advances in microstructure‐engineered silicon alloy anodes for LIBs. The electrochemical performances of silicon alloy anodes with various morphologies, such as nanoparticles, nanowires, two‐dimensional layered structures, porous structures, and thin films, are discussed in detail. The challenges for the commercial application of silicon alloy anodes are elaborated in the end. This review provides a comprehensive overview and concerns of microstructure‐engineered silicon alloy anodes for potential applications in LIBs.

Tailoring surface chemistry of MXenes to boost initial coulombic efficiency for lithium storage

MXenes are expected to exhibit excellent lithium-ion storage performance due to its good electron conductivity, tunable functional groups, and unique accordion-like structure. However, they suffer from low initial coulombic efficiency (ICE) caused by the trapping and the irreversible reaction between MXene nanosheets and lithium ions. In this work, we propose a facile d-band center regulation strategy via doping engineering to achieve tailorable surface chemistry of MXene, revealing the intrinsic effects of heteroatoms doping on surface chemistry and ICE. This strategy can be applied to various MXenes, which is verified in the case of V2-yCryC as well as TiNbC, and TiVC MXenes. Typically, the V1.8Cr0.2C MXene delivers a double lithium storage capacity in comparison to V2C MXene. Its ICE is improved from 60% to 86%, surpassing most state-of-the-art MXenes. Theoretical calculations reveal that the shift of the d-band center towards the Fermi level is induced by the introduction of Cr and responsible for the improved electrochemical performance. It increases its chemical affinity and absorbability for oxygen-containing functional groups and lithium ions, providing a favorable surface chemistry for efficient lithium storage. This work provides a new strategy to tailor the fine structures of MXenes for their further energy storage applications.

Interfacial Engineering of Defect‐Rich and Multi‐Heteroatom‐Doped Metal–Organic Framework‐Derived Manganese Fluoride Anodes to Boost Lithium Storage

Manganese fluoride (MnF2) is a high‐performance lithium‐ion battery anode material with an excellent structural stability, low synthesis cost, and better manufacturing convenience. However, its low theoretical capacity (577 mAh g−1), weak conductivity of fluoride, and poor recyclability limit its practical application. Fortunately, oxygen vacancies (Ov) and heteroatomic doping are among the most promising strategies to modulate the inherent reduced electronic conductivity and kinetic response of electrode materials in order to boost their lithium storage capacity. Herein, self‐templating, self‐optimizing, and self‐supporting metal–organic framework template approach with the introduction of oxygen vacancies by substitution of exogenous heteroatoms is proposed, where triple heteroatom‐doped (N, O, and F) carbon‐encapsulated MOF‐derived manganese fluoride (Ov‐ZMF@NOFs) microstructures are designed. Interestingly, the exogenously introduced triple heteroatomic carbon matrix forms a fluffy three‐dimensional mechanical structure, interlaced conducting networks, efficient conducting pathways, and intense electrochemical dynamics at the periphery of the manganese fluoride nanoparticles. Benefiting from the above‐mentioned features, the Ov‐ZMF@NOFs exhibit expected electrochemical properties with ultra‐long recyclability (high reversible capacity of 419 mAh g−1 at 6 A g−1) and good rate performance (capacity of 232 mAh g−1 at a current density of 16 A g−1). Theoretical calculations underline the essential contribution of multiple heteroatoms doping in boosting the electrode conductivity and reducing the lithium‐ion migration energy barrier. Combining controllable vacancy engineering and heteroatom doping technology at the nanoscale provides a new philosophy and concept for the design and fabrication of next‐generation high‐energy lithium‐ion battery materials.

QPHT graphene as a high-performance lithium ion battery anode materials with low diffusion barrier and high capacity

In past two decades, scientists have worked to find battery anode materials with high lithium storage capacity and good electrical conductivity to better solve the problems of environmental protection, cleanliness and sustainable energy. In this manuscript, we choose a novel two-dimensional carbon material that can exist stably at room temperature — QPHT graphene, as the research object. By employing first-principles calculations, we investigated the diffusion barrier and open circuit voltage of QPHT graphene. Similar to graphene, QPHT graphene has a relatively low lithium diffusion potential barrier (<0.83 eV), high lithium storage capacity (837 mAh/g) and average open circuit voltage (0.66 V), making it an auspicious anode material for fast charge/discharge lithium ion battery. The present study is essential for exploring the application of novel graphene in lithium ion battery anode materials.

Enabling Increased Delithiation Rates in Silicon‐Based Anodes through Alloying with Phosphorus

AbstractThe capability of battery materials to deliver not only high lithium storage capacity, but also the ability to operate at high charge/discharge rates is an essential property for development of new batteries. In the present work, the influence on the charge/discharge rate behaviour of substoichiometric concentrations of phosphorus (P) in silicon (Si) nanoparticles was studied. The results revealed an increase in rate capability as a function of the P concentration between 0 and 5.2 at %, particularly during delithiation. The stoichiometry of the nanoparticles was found to strongly affect the formation of the Li3.5Si phase during lithiation. Cyclic stability experiments demonstrated an initial increase in capacity for the SiPx materials. Galvanostatic intermittent titration technique and electrochemical impedance spectroscopy demonstrated the increased lithium diffusivity with inclusion of P. Density functional theory and ab initio molecular dynamics were deployed to provide a rationale for the electrochemical behaviour of SiPx.

Interfacial engineering of graphene aerogel encapsulated FeSe2-Fe2O3 heterojunction nanotubes for enhanced lithium storage

Heterointerface engineering has been proved to be an effective strategy to improve the electrochemical performances of electrode materials by overcoming inherent drawbacks of single phase electrode. However, the rational construction of heterogeneous composite with abundant heterogeneous interfaces for lithium-ion batteries (LIBs) remains a great challenge. Herein, graphene aerogel encapsulated FeSe2-Fe2O3 heterojunction nanotubes (FeSe2-Fe2O3@GA) with inner-outer bi-interfacial structures were fabricated by freeze-drying method and partial selenization treatment. The built-in electric fields induced on the FeSe2-Fe2O3 could greatly lower the activation energy for rapid charge transfer kinetics. And GA as outer surface not only could maintain the integrity of active material structure, but also enhance its electronic conductivity. Benefiting from these advantages, the FeSe2-Fe2O3@GA anode exhibits an improved electrochemical performance in term of lithium storage capacity (1515.6 mAh g−1 at 0.2 A g−1), cycle stability and high rate capability (492.7 mAh g−1 after 600 cycles at 1 A g−1). The kinetics analysis and theoretical calculation also interpret the significant role of heterointerface engineering construction in improving the reaction kinetics of lithium storage.

Regulating bifunctional flower-like NiFe2O4/graphene for green EMI shielding and lithium ion storage

• A novel flower-like composite with adjustable structure is fabricated. • The composite is a potential and adjustable green EMI shielding material. • Fast energy storage and long-cycle stability under high current density are realized. • The composite achieves EM energy conversion-storage and lithium ion energy storage. Environment and energy are the eternal hot topics in the world, multiloculated microscale materials have attracted great attention in the field of electromagnetic interference (EMI) shielding and lithium ions storage. Herein, a novel flower-like NiFe 2 O 4 /graphene composite with adjustable structure was fabricated as EMI shielding material and anode material of lithium-ion batteries. NiFe 2 O 4 /graphene composite is a potential green EMI shielding material. The EMI shielding effectiveness ( SE ) increases with the increase of graphene content in NiFe 2 O 4 /graphene composite, and the total EMI SE of NiFe 2 O 4 /graphene with 73.6 wt.% graphene increases from 26.5 to 40.6 dB with the increase of frequency in 2–18 GHz. Furthermore, it exhibits long-life and large capacity lithium storage performance at high current density. The capacity reaches 732.79 mAh g −1 after 100 cycles at 0.1 A g −1 , recovering to more than 139% from the minimum capacity value. After 300 cycles at 0.5 A g −1 , the capacity increases to 688.5 mAh g −1 . The initial capacities at 2 and 5 A g −1 are 704.9 and 717.8 mAh g −1 , and remain 297.9 and 203.2 mAh g −1 after 1000 cycles. The distinguished EMI shielding performance and electrochemical performance are mainly ascribed to the structure regulation of NiFe 2 O 4 /graphene composite, as well as the synergistic effect of graphene and NiFe 2 O 4 . This research opens up infinite opportunities for the application of multifunctional and interdisciplinary materials.

Dense T-Nb2O5/Carbon Microspheres for Ultrafast-(Dis)charge and High-Loading Lithium-Ion Batteries.

Orthorhombic niobium pentoxide (T-Nb2O5) is regarded as a potential anode material for lithium-ion batteries (LIBs) due to ultrafast charge/discharge and high safety. However, the poor electronic conductivity and low mass loading of nanostructured T-Nb2O5 limit its practical application in LIBs. Herein, we design and construct dense microspheres consisting of nanostructured T-Nb2O5 embedded in amorphous N-doped carbon (Nb2O5@NC) via a facile method to achieve fast ionic and electronic transport as well as a high mass loading. The dense micro-sized particles with an interconnected carbon network avoid the low mass loading and volumetric energy density of conventional nanostructures. Interconnected pores in the range of a few nanometers are also formed in the Nb2O5@NC microspheres. Notably, at a high mass loading of 12.8 mg cm-2, Nb2O5@NC can achieve a high specific capacity of 171.5 mAh g-1 and an areal capacity of 2.05 mAh cm-2, showing its high lithium storage capacity. The intercalation reaction mechanism with a small volume change during cycling at both crystal lattice and microsphere levels is confirmed by in situ X-ray diffraction and in situ high-resolution transmission electron microscopy. The elegant structure and the electrochemical reaction mechanism disclosed in the work is important for designing ultrafast-(dis)charge electrode materials.

First-Principles Study on the Structural, Electronic, and Lithium Storage Properties of Ti3C2T2 (T = O, F, H, OH) MXene.

The structures of bare Ti3C2 and functionalized Ti3C2T2 (T = O, F, H, OH) MXenes were constructed, and the effect of surface functional groups T2 (T = O, F, H, OH) on the structural, electronic, and lithium storage properties were investigated by first-principles calculations. The results show that the proximity of surface functional groups will induce some lattice distortion of Ti3C2T2 MXene. The degree of lattice distortion depends mainly on the adsorption position of functional groups and the types of surface functional groups. From the point of view of forming energy, the surface functional groups tend to be located at the CCP site. From the energy band and DOS results, the presence of surface functional groups has a significant effect on the valence band, while it has a slight impact on the conduction band. In terms of lithium storage, lithium atom adsorption starts from the HCP position for bare Ti3C2, while functionalized Ti3C2T2 starts from the CCP position. The double-layer lithium storage capacity of bare Ti3C2 and Ti3C2O2 were 639.78 mAh/g and 537.22 mAh/g, respectively. And the single-layer lithium storage capacity of Ti3C2F2 was 130.77 mAh/g.

Electrospinning fabrication of Sb-SnSb/TiO2@CNFs composite nanofibers as high-performance anodes for lithium-ion batteries

The SnSb and TiO2 nanoparticles uniformly embedded into continuous and conductive carbon nanofibers (CNFs) are successfully fabricated through facile electrospinning combined with calcination treatments. The characterization results of the targeted composite nanofibers (Sb-SnSb/TiO2@CNFs-2) confirm that the presence of TiO2 is of significant importance to construct the elaborately designed and intact fiber structure, in which the optimal dosage of the TiO2 precursor is precisely controlled at 2 mmol. Moreover, high theoretical specific capacity of SnSb, available inhibitory effect of TiO2, and great electronic conductivity of CNFs are cooperatively integrated into the Sb-SnSb/TiO2@CNFs-2 composite nanofibers, guaranteeing the enhanced lithium storage capacity and cycling performance when being employed as the anode electrodes. Specifically, the Sb-SnSb/TiO2@CNFs-2 electrode can not only deliver initial discharge specific capacity of 1146.6 mAh/g at 100 mA/g and reversible discharge specific capacity of 580.4 mAh/g after 100 cycles, but also retain discharge specific capacity of 561.3 mAh/g after rate cycles along with recovering the current density to 100 mA/g. Importantly, the Sb-SnSb/TiO2@CNFs-2 electrode is also endowed with prominent advantages in the pseudocapacitive contribution of 66.89 % at 0.8 mV/s. Those investigations and findings of the Sb-SnSb/TiO2@CNFs-2 composite electrodes with facile fabrication process and excellent electrochemical performance can contribute to the practical application of the alloy anodes in the field of the energy storage.