Cycling Stability Research Articles

Sustainable Release of LiNO3 from a Fluorine‐Decorated Metal–Organic Framework Separator to Enable High‐Performance Li‐Metal Batteries in Carbonate Electrolytes

AbstractHigh‐voltage Li‐metal batteries hold great prospects for boosting energy density, while the Li‐metal anodes show poor compatibility with high‐voltage tolerant carbonate electrolytes, leading to unstable solid‐electrolyte interphase (SEI) and uncontrolled Li dendrites growth. Herein, a F‐decorated UIO‐66/polyimide (PI) functional separator encapsulated with LiNO3 (LNO@UIO‐66F/PI) is rationally designed to regulate the interfacial chemistry and Li deposition behavior. Specifically, the UIO‐66F nanoparticles in situ grown on the PI fibers form continuous electronegative nanochannels, which promote rapid and uniform Li+ flux while repelling the anion migration. Furthermore, the LiNO3 encapsulated in the UIO‐66F nanopores sustainably releases to form a thin and conductive Li3N‐rich SEI. This synergy effect induces a dense and spherical Li deposition behavior, effectively inhibiting the growth of Li dendrites. Consequently, this LNO@UIO‐66F/PI separator demonstrates highly reversible Li plating/stripping over 1000 h at an extremely high current density of 10 mA cm−2 in carbonate electrolytes, and also enables the stable cycling of Li||LiNi0.8Co0.1Mn0.1O2 cell over 1000 cycles under a high cut‐off voltage of 4.5 V, paving the way for practical application of high‐energy‐density Li‐metal batteries.

Chemical Looping Combustion for Coupling with Efficient CO2 Capture and Utilization: Stable Oxygen Carriers and Carbon Cycle

Chemical Looping Combustion for Coupling with Efficient CO₂ Capture and Utilization: Stable Oxygen Carriers and Carbon Cycle

Electrolyte Chemistry Towards Ultra‐High Voltage (4.7 V) And Ultra‐Wide Temperature (−30 to 70 °C) LiCoO2 Batteries

AbstractLiCoO2 batteries for 3 C electronics demand high charging voltage and wide operating temperature range, which are virtually impossible for existing electrolytes due to aggravated interfacial parasitic reactions and sluggish kinetics. Herein, we report an electrolyte design strategy based on a partially fluorinated ester solvent (i.e., DFEA) that achieves a balance between weak Li+‐solvent interactions, sufficient salt dissociation, high interfacial stability, and superior thermal stability to address the aforementioned challenges. The resulting high‐voltage wide‐temperature electrolyte (HWE) not only possesses low desolvation energy, fast Li+ transport, high oxidation stability, excellent thermal‐abuse tolerance and non‐flammability, but also enables the formation of both inorganic‐rich cathode electrolyte interphase (CEI) and solid electrolyte interphase (SEI). Owing to the above merits, this HWE endows the highly stable operation of LiCoO2 cathodes under an ultra‐high voltage of 4.7 V and Graphite || LiCoO2 batteries in an ultra‐wide temperature range of −30 to 70 °C. Meanwhile, a 1.7 Ah‐level 4.6 V Graphite || LiCoO2 pouch cell with a high energy density of 240 Wh kg−1 also delivers excellent cycling stability, representing a significant advancement in the design of electrolytes towards ultra‐high voltage and ultra‐wide temperature batteries.

Li+ Quasi‐Grotthuss Topochemistry Transport Enables Direct Regeneration of Spent Lithium‐Ion Battery Cathodes

AbstractDirect regeneration of spent lithium‐ion batteries offers economic benefits and a reduced CO2 footprint. Surface prelithiation, particularly through the molten salt method, is critical in enhancing spent cathode repair during high‐temperature annealing. However, the sluggish Li+ transport kinetics, which predominantly relies on thermally driven processes in the traditional molten salt methods, limit the prelithiation efficiency and regeneration of spent cathodes. Here, we introduce a special molecular configuration (benzoate) into molten salts that facilitates rapid Li+ transport to the surface of LiNi0.5Co0.2Mn0.3O2 (NCM) via a quasi‐Grotthuss topochemistry mechanism. This approach effectively avoids the phase transitions that could adversely degrade the electrochemical performance due to insufficient lithiation during the repair process. Computational and experimental analyses reveal that the system enables fast Li+ migration through the topological hopping of benzoate in organic lithium salt, rather than relying solely on thermally driven diffusion, thereby significantly improving the prelithiation and repair efficiency of spent NCM cathodes. Benefiting from the quasi‐Grotthuss Li+ topochemistry transport, the degraded structure and Li vacancies in the spent cathode are effectively eliminated, yieding the regenerated cathode with good cycling stability comparable to commercial counterparts. The proposed Li+ transport mechanism presents a promising route for the efficient and sustainable regeneration of spent cathodes.

Dual‐Pillar Effect in P2‐Type Na0.67Ni0.33Mn0.67O2 Through Na Site Substitution Achieve Superior Electrochemical and Air/Water Dual‐Stability as Cathode for Sodium‐Ion Batteries

AbstractHigh‐voltage phase changes limit the capacity and cycle stability of P2‐type sodium‐layered transition metal oxides. In this study, Cu, Zn, and Mg ions are successfully co‐doped into Na0.67Ni0.33Mn0.67O2 to restrain the phase transition and increase Na+ diffusion with enhanced structural stability. In situ and ex situ evaluations elucidate the structural and charge compensation during high‐voltage operation. Remarkably, the resultant Na0.76Ni0.23Cu0.07Zn0.03Mn0.62Mg0.05O2 (NNCZMMO) cathode exhibits superior rate capability (135 and 94.0 mA h g−1 at 0.1C and 5C), prolonged‐cycling stability (85.4% capacity retention over 1000 cycles at 5C) and excellent air/water stability over 40 days. According to density functional theory (DFT), scanning transmisson electron microscopy (STEM), and other assessments, Cu at 2a sites strengthens the metal layer, whereas Zn/Mg on Na sites creates a “dual‐pillar” effect to avoid cracks and O2 phase formation during desodiation. Impressively, NNCZMMO//hard carbon (HC) full‐cell achieved an exceptional average voltage of 3.58 V and an outstanding energy density of 284.7 Wh kg−1 at 60.8 W kg−1 and 104.23 Wh kg−1 at 2439.5 W kg−1. This innovative approach enables the rapid fabrication of high‐energy‐density cathodes for grid‐scale energy‐storage usages.

Regioisomeric Engineering for Multicharge and Spin Stabilization in Two-Electron Organic Catholytes.

Developing multicharge and spin stabilization strategies is fundamental to enhancing the lifetime of functional organic materials, particularly for long-term energy storage in multiredox organic redox flow batteries. Current approaches are limited to the incorporation of electronic substituents to increase or decrease the overall electron density or bulky substituents to sterically shield reactive sites. With the aim to further expand the molecular toolbox for charge and spin stabilization, we introduce regioisomerism as a scaffold-diversifying design element that considers the collective and cumulative electronic and steric contributions from all of the substituents based on their relative regioisomeric arrangements. Through a systematic study of regioisomers of near-planar aromatic cyclic triindoles and nonplanar nonaromatic cyclic tetraindoles, we demonstrate that this regioisomeric engineering strategy significantly enhances the H-cell cycling stability in the above two new classes of 2e- catholytes, even when current strategies failed to stabilize the multicharged species. Density functional theory calculations reveal that the strategy operates by redistributing the charge and spin densities while highlighting the role of aromaticity in charge stabilization. The most stable 2e- catholyte candidate was paired with a viologen derivative anolyte to achieve a proof-of-concept all-organic flow battery with 1.26-1.49 V, 98% capacity retention, and only 0.0117% fade/h and 0.00563% fade/cycle over 400 cycles (192 h), which is the highest capacity retention ever reported over 400 cycles in a multielectron all-organic flow battery setup. We anticipate regioisomeric engineering to be a promising strategy complementary to conventional electronic and steric approaches for multicharge and spin stabilization in other functional organic materials.

Nickel Metal-Organic Framework-Based Surfaces for Effective Supercapacitor Application

Abstract Metal–organic frameworks (MOFs), characterized by strong bonds between organic ligands and metal ions, exhibit high porosity, large surface area, and exceptional chemical stability when carefully designed. In this study, a novel MOF comprising lead ions and ligands derived from 2-carboxybenzaldehyde and 4-aminobenzoic acid was synthesized using a sonochemical approach. This innovative method enabled the rapid formation of highly porous crystals with a BET surface area of 1181.45 m2 g1 and a total pore volume of 2.27 cm3 g−1 at P/P₀ = 0.3023. Comprehensive characterization techniques, including thermal analysis, SEM, EDX, PXRD, and FT-IR, confirmed the successful formation of the MOF structure. The synthesized MOF was utilized to fabricate an enhanced Ni-MOF electrode, demonstrating superior electrochemical performance for capacitor applications. The electrode achieved a specific capacitance of 402 F g−1 at 1 mA cm−2 and maintained excellent cycling stability, with 87.9% capacitance retention over 4000 cycles at 5 A g−1. These results underline the potential of the synthesized MOF in advancing energy storage technologies, particularly in developing high-performance and durable electrochemical capacitors.

Design and Preparation of Soluble Polyimide Binder With Random Copolymerized Rigid‐Flexible Segments for Lithium Ion Batteries

ABSTRACTBinders play a critical role in the preparation and operation of electrodes in lithium‐ion batteries (LIBs). Developing new binding materials with high affinity to Li ions and resistance to higher voltages was desirable for the practical applications of LIBs. In this work, soluble polyimide binder (PI) with random copolymerized rigid‐flexible segments were synthesized and evaluated as cathode binder for the typical lithium iron phosphate cathode material in terms of cycling performances, rate capability, and electrochemical impedance. By introducing the polar and soft ether segment into the rigid PI chains, the NMP‐soluble PI precursors were obtained. The rigid‐flexible segments in the PI binders work synergistically during the electrochemical process, in which the rigid segments of aromatic units with strong lithiophilic CO group provided the necessary mechanical support and affinity with electrolytes, while the flexible segments endow the high solubility and buffer effect to the volume change during the charge/discharge process. Moreover, the 3,5‐diaminobenzoic acid (DABA) working as the crosslinking unit was introduced during the synthesis and the addition ratios were optimized. The as‐optimized PI binders exhibited superior rate performances and comparable cycling stability when compared with the commercial PVDF binder, demonstrating the great potential for PI binder in the LIBs systems.

Enhanced lithium-ion battery performance with a novel composite anode: S-doped graphene oxide, polypyrrole, and fumed silica

In this work, a novel composite anode material was developed, utilizing S-doped graphene oxide (SGO), polypyrrole (PPy), and fumed silica to enhance the performance of lithium-ion batteries (LIBs). The chronoamperometric approach was used to produce SGO, while the chemical method was employed to synthesize PPy. A composite of SGO, PPy, and fumed silica was prepared as an anode for a half-cell, using two samples: one with a high PPy ratio (S1) and the other with a low PPy ratio (S2) and compared the results with bare sample (S0). The S1 sample exhibited a good initial discharge capacity (648 mAh g-1), with capacities of 207 and 131 mAh g-1at 5 C and 10 C, respectively. S1 and S2 also demonstrated superior cycling stability at a high current (100 cycles at 10 C), with a retention capacity of 99 and 87%, respectively compared with S0 which retained only 68%. Coin-type full cells with S1 as the anode and LiFePO4(LFP) as the cathode were assembled and compared with commercial graphite anodes. The S1 full cell showed a high reversible capacity (164 mAh g-1at 0.1 C), with a capacity retention of 66% after 100 cycles at 10 C. At the same time, the graphite anode exhibited a reversible capacity of 133 mAh g-1at 0.1 C, with a capacity retention of 58% after 100 cycles at 10 C. The S1 full cell achieved a gravimetric energy density of 164 W h kg-1at 0.1 C and 49 W h kg-1at 10 C, which is 25% greater than that of the graphite full cell(39 W h kg-1) at 10 C. These distinguishing characteristics of S1 make it a viable substitute for graphite as a high-performance anode material in LIBs, opening the possibility for devices with reliable battery systems.

4,4′,4″-Tris(Diphenylamino)Triphenylamine: A Compatible Anion Host in Commercial Li-Ion Electrolyte for Dual-Ion Batteries

Dual-ion batteries (DIBs) were demonstrated as a promising technology for large-scale energy storage due to their low cost, recyclability, and impressively fast charge capability. Graphite as a commonly used cathode material in DIBs, however, suffers from poor compatibility with commercial Li-ion electrolytes and graphite anodes, making it difficult to directly utilize the well-established infrastructure for Li-ion batteries. Herein, we report a small aromatic amine molecule 4,4′,4″-tris(diphenylamino)triphenylamine (N4) functioning as a compatible anion host in the EC-containing Li-ion electrolyte. With an average discharge voltage of 3.6 V (vs. Li+/Li), the N4 electrode delivers a reversible specific capacity of 108 mAh/g, which is much higher than 29 mAh/g for the graphite cathode at the same condition. The high capacity retention of 91.3% was achieved after 500 cycles at 1 A/g. The N4 electrode also exhibited good rate performance. Via different characterization techniques like Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, the energy storage mechanism of N4 was revealed as a conversion between amine and quaternary amine cations, accompanied by PF6− (de-)insertion. As consequences, the assembled N4||graphite DIB w showed a high discharge capacity of 90 mAh/g within 1.5–4.1 V, and good cycling stability with a 98% capacity retention after 40 cycles. Decent rate performance was achieved in the N4||graphite DIB as well. This work provides new insights into designing a compatible anion host for affordable DIBs.

Unveiling the Advantages of Silicon Nitride Nanoparticle Anodes for Enhanced Cyclic Stability, Rate Performance, and Mechanical Robustness

Unveiling the Advantages of Silicon Nitride Nanoparticle Anodes for Enhanced Cyclic Stability, Rate Performance, and Mechanical Robustness

Investigation of a Biochemical Model with Recycling in Case of Negative Cooperativity

The objective of this paper is to find new dynamic perspectives in a well-known two dimensional nonlinear system which is a modification of the phosphofructo kinase model by incorporating recycling of the product, p, into the substrate, s. Specifically, we investigate the affect of the negative cooperativity on the number of equilibria and their stability. Moreover, in the parameter space, we analyze analytically and numerically the number of periodic oscillations (solutions) and their stability using Lyapunov coefficients (in other words, quantities and focus values). Thus, we obtain that three different dynamical conditions (regimes) take place: (1) structurally unstable, (2) the existence of an unstable limit cycle with an external stable limit cycle, and (3) the existence of a stable limit cycle with an external unstable limit cycle. Moreover, for a zero rate of product synthesis (due to e.g., defective enzyme), we obtain that the modified system has a first integral.

A Bifunctional Imidazolyl Iodide Mediator of Electrolyte Boosts Cathode Kinetics and Anode Stability Towards Low Overpotential and Long‐Life Li‐O2 Batteries

AbstractThe addition of a redox mediator as soluble catalyst into electrolyte can effectively overcome the bottlenecks of poor energy efficiency and limited cyclability for Li‐O2 batteries caused by passivation of insulating discharge products and unfavorable byproducts. Herein we report a novel soluble catalyst of bifunctional imidazolyl iodide salt additive, 1,3‐dimethylimidazolium iodide (DMII), to successfully construct highly efficient and durable Li‐O2 batteries. The anion I− can effectively promote the charge transport of Li2O2 and accelerate the redox kinetics of oxygen reduction/oxygen evolution reactions on the cathode side, thereby significantly decreasing the charge/discharge overpotential. Simultaneously, the cation DMI+ forms an ultrathin stably solid‐electrolyte interphase film on Li metal, greatly inhibiting the shuttle effect of I− and improving the stability of anode. Using this DMII additive, our Li‐O2 batteries achieve an extremely low voltage of 0.52 V and ultra‐long cycling stability over 960 h. Notably, up to 95.8 % of the Li2O2 yield further proves the reversible generation/decomposition of Li2O2 without the occurrence of side reactions. Both experimental and theoretical results disclose that DMII enables Li+ easily solvated, testifying the dominance of the solution‐induced reaction mechanism. This work provides the possibility to design the soluble catalysts towards high‐performance Li‐O2 batteries.

Preparation of CoNi‐LDH‐Modified Polypropylene‐Based Carbon Fiber Membranes for Flexible Supercapacitors

ABSTRACTThe rapid development of flexible electronic devices has placed higher demands on the development of high‐performance flexible supercapacitors. In this work, a safe and simple method was developed to prepare cobalt–nickel layered double hydroxide (CoNi‐LDH) flexible electrodes. Metal–organic framework (MOF)‐derived CoNi‐LDH was successfully grown on the surface of polypropylene nonwoven flexible carbon fiber membranes through plasma oxidation treatment, grafting of cobalt‐based MOFs, and room‐temperature etching in Ni2+ solution. The prepared flexible modified carbon fiber membrane (CPO‐CoNi‐40‐0.5) has good mechanical properties with a tensile strength of 159.26 ± 63.03 kPa. In addition, the CPO‐CoNi‐40‐0.5 electrode has a high specific capacitance of 580 F g−1 at 1 A g−1. The assembled supercapacitor maintains 99% of the initial specific capacity after 7000 cycles and 98% of the initial specific capacity when it is folded at 90°, showing excellent long cycle stability and bending resistance. This paper provides a new way to promote the development of high‐performance and low‐cost flexible electrodes.

Mechanically Robust Bismuth-Embedded Carbon Microspheres for Ultrafast Charging and Ultrastable Sodium-Ion Batteries.

Advancements in the development of fast-charging and long-lasting microstructured alloying anodes with high volumetric capacities are essential for enhancing the operational efficiency of sodium-ion batteries (SIBs). These anodes, however, face challenges such as declined cyclability and rate capability, primarily due to mechanical degradation reduced by significant volumetric changes (over 252%) and slow kinetics of sodium-ion storage. Herein, we introduce a novel anode design featuring densely packed bismuth (Bi) embedded within highly conductive carbon microspheres to overcome the aforementioned challenges. Remarkably, the high loading Bi anode within carbon microspheres with a high tap density of 2.59 g cm-3 possesses significant mechanical strength exceeding 590 MPa and limits volume swelling of only 10.9% post-sodiation. This anode demonstrates a high volumetric capacity (908.3 mAh cm-3), ultrafast chargeability (200 A g-1, full charge/discharge in just 5.5 s), and outstanding cyclability over 12,000 cycles and maintains exceptional cycling stability even at -30 °C. The full cell paired with a Na3V2(PO4)3 cathode retains over 80% capacity after 600 cycles at 36 C, demonstrating a remarkable rate capability of 126 C (full charge/discharge in 28.6 s). Our comprehensive experimental evaluations and chemo-mechanical simulations shed light on the mechanisms underpinning the anode's superior performance. This development marks a significant advancement in the design of durable and fast-charging anodes for high-performance SIBs.

Enhanced ALD Nucleation on Polymeric Separator for Improved Li-S Batteries.

Lithium-sulfur (Li-S) batteries, with their superior energy densities, are emerging as promising successors to conventional lithium-ion batteries. However, their widespread adoption is hindered by challenges such as the shuttle effect of polysulfides, which affects discharge capacity and cycling stability. This study explores the transformative potential of atomic layer deposition (ALD) of Al2O3 on commercial PP/PE/PP separators (Celgard), combined with the use of UV ozone exposure to enhance ALD nucleation on the separator surface, to address these challenges. We demonstrate that ALD Al2O3 not only preserves the separator's inherent morphology but also enhances its chemical interactions toward polysulfide, crucial for optimal battery performance. Moreover, batteries with the modified separator exhibit an enhanced specific capacity, reaching up to ∼1150 mAh/g, and a reduced lithium plating overpotential, indicating improved kinetics. Our findings, based on X-ray photoelectron spectroscopy surface characterization and electrochemical evaluations, underscore the significance of ALD-enhanced separators in elevating Li-S battery efficiency by polysulfide adsorption. The research opens up possibilities for high-performance Li-S batteries, suitable for a broad range of applications.

Rational Design of Prussian Blue Analogues for Ultralong and Wide-Temperature-Range Sodium-Ion Batteries.

Architecting Prussian blue analogue (PBA) cathodes with optimized synergistic bimetallic reaction centers is a paradigmatic strategy for devising high-energy sodium-ion batteries (SIBs); however, these cathodes usually suffer from fast capacity fading and sluggish reaction kinetics. To alleviate the above problems, herein, a series of early transition metal (ETM)-late transition metal (LTM)-based PBA (Fe-VO, Fe-TiO, Fe-ZrO, Co-VO, and Fe-Co-VO) cathode materials have been conveniently fabricated via an "acid-assisted synthesis" strategy. As a paradigm, the FeVO-PBA (FV) delivers a superb rate capability (148.9 and 56.1 mAh/g under 0.5 and 100 C, respectively), remarkable cycling stability over 30,000 cycles, high energy density (259.7 Wh/kg for the full cell), and a wide operation-temperature range (-60-80 °C). In situ/ex situ techniques and density functional theory calculations reveal the quasi-zero-strain and multielectron redox mechanisms of the FeVO-PBA cathode during cycling, supporting its higher specific capacity and stable cycling. It is considered that the d-d electron compensation effect between Fe and V enhanced the reversibility and kinetics of redox reactions and simultaneously improved the electronic conductivity and structural stability of the FeVO-PBA cathode. This work may pave a new way for the rational design of high-performance cathode materials with bimetallic reaction centers for SIBs.

Hydrophobic PU fabric with synergistic conductive networks for boosted high sensitivity, wide linear-range wearable strain sensor.

Strain sensing fabrics are able to sense the deformation of the outside world, bringing more accurate and real-time monitoring and feedback to users. However, due to the lack of clear sensing mechanism for high sensitivity and high linearity carbon matrix composites, the preparation of high performance strain sensing fabric weaving is still a major challenge. Here, an elastic polyurethane(PU)-based conductive fabric(GCPU) with high sensitivity, high linearity and good hydrophobicity is prepared by a novel synergistic conductive network strategy. The GCPU fabric consists of graphene sheets(GS)/carbon nanotubes(CNTs) elastic conductive layer and a PU elastic substrate. GS and CNTs can be constructed into a synergistic conductive network, and the fabric is endowed with high conductivity(1.193 S m-1). Simulated equivalent circuits show that GS in the conductive network will break violently under applied strain, making the GCPU fabric extremely sensitive(gauge factor 102). CNTs are spatially distributed in GS lamellae, avoiding the phenomenon that the constructed synergistic conductive network is violently fractured under the applied strain, which leads to the decrease of linearity(0.996). SEBS was used as a dispersant and binder to uniformly disperse and closely bond GS and CNTs into PU fabrics. In addition, the hydrophobicity of SEBS makes the GCPU fabric resistant to water environment(The contact Angle is 123°). Due to the good mechanical stability of GCPU fabric, GCPU fabric has a wide strain range(0-50%) and high cycle stability(over 1000 cycles). In practice, GCPU fabric can accurately simulate and detect the size and deformation motion of human body. Therefore, the successful construction of elastic fabrics with synergistic conductive networks provides a feasible path for the design and manufacture of wearable intelligent fabrics.

A Bifunctional Imidazolyl Iodide Mediator of Electrolyte Boosts Cathode Kinetics and Anode Stability Towards Low Overpotential and Long-Life Li-O2 Batteries.

The addition of a redox mediator as soluble catalyst into electrolyte can effectively overcome the bottlenecks of poor energy efficiency and limited cyclability for Li-O2 batteries caused by passivation of insulating discharge products and unfavorable byproducts. Herein we report a novel soluble catalyst of bifunctional imidazolyl iodide salt additive, 1,3-dimethylimidazolium iodide (DMII), to successfully construct highly efficient and durable Li-O2 batteries. The anion I- can effectively promote the charge transport of Li2O2 and accelerate the redox kinetics of oxygen reduction/oxygen evolution reactions on the cathode side, thereby significantly decreasing the charge/discharge overpotential. Simultaneously, the cation DMI+ forms an ultrathin stably solid-electrolyte interphase film on Li metal, greatly inhibiting the shuttle effect of I- and improving the stability of anode. Using this DMII additive, our Li-O2 batteries achieve an extremely low voltage of 0.52 V and ultra-long cycling stability over 960 h. Notably, up to 95.8 % of the Li2O2 yield further proves the reversible generation/decomposition of Li2O2 without the occurrence of side reactions. Both experimental and theoretical results disclose that DMII enables Li+ easily solvated, testifying the dominance of the solution-induced reaction mechanism. This work provides the possibility to design the soluble catalysts towards high-performance Li-O2 batteries.

Research on the Performance Optimization of Molybdenum Disulfide for Multifunctional Applications

Molybdenum disulfide (MoS2), as a typical transition metal chalcogenide compound, has emerged as a research hotspot in nanomaterials due to its excellent electrochemical properties and catalytic activity. However, conventional MoS2 exhibits certain limitations in terms of its catalytic performance, electrical conductivity, and cycling stability. To address these issues, this paper aims to explore the improvement of the multifunctional performance of MoS2 via different performance optimisation strategies, such as heteroatom doping, semiconductor composites, as well as metallic and non-metallic loading. By reviewing and analyzing the relevant literature on the performance enhancement of MoS2 in recent years, this paper summarizes the specific applications and effects of these optimization strategies, highlighting that they significantly improve the performance of MoS2 in fields such as optics, electrochemical catalysis, lithium batteries, and supercapacitors, particularly in terms of catalytic activity, electrical conductivity, and cycling stability. The results indicate that the optimisation of MoS2 performance provides an important theoretical basis and practical guidance for its application in energy storage and catalytic hydrogen evolution.