Organic Anode Material Research Articles

Synergizing Proton‐Dominated Storage and Electron Transfer for High‐Loading, Fast‐Rate Organic Anode in Metal‐Free Aqueous Zinc‐Ion Batteries

AbstractDeveloping suitable anode materials to fabricate metal‐free Zinc ion battery is a promising strategy to solve the issues of Zn metal anode, such as dendrite growth and side reactions. However, the reported anode materials face shortcomings such as unsatisfactory rate performance, low mass loading, etc. Herein, featuring synergetic proton‐dominated storage and electron transfer, a conjugated polyimide nanocomposite trapped by multi‐walled carbon nanotubes (PPN‐MWCNT) is developed for high‐loading, fast‐rate organic anode materials in metal‐free Zinc ion battery. Specifically, abundant hydrophilic active sites and nonplaner conjunctional structure in PPN achieve proton‐dominated storage with two steps four electrons mechanism, leading to fast ion diffusion, and the intimate contact between the polymer and MWCNT via in situ polymerization ensures the excellent charge transfer and robust structure. Thus, the PPN‐MWCNT electrode delivers low redox potential, ultrahigh rate performance (50 A g−1), superior loading capability (≈40 mg cm−2) and exceptional long‐term cyclability (over 12 000 cycles). More importantly, the full batteries assembled with PPN‐MWCNT anode and different cathodes deliver a high energy density of 106.4 Wh kg−1 (PPN‐MWCNT//MnO2) and 83.7 Wh kg−1 (PPN‐MWCNT//active carbon‐I2), exceeding the most reported metal‐free Zinc ion batteries.

A low redox potential and long life organic anode material for sodium-ion batteries

Sodium-ion batteries (SIBs) with organic electrodes are an emerging research direction due to the sustainability of organic materials based on elements like C, H, O, and sodium ions. Currently, organic electrode materials for SIBs are mainly used as cathodes because of their relatively high redox potentials (>1 V). Organic electrodes with low redox potential that can be used as anode are rare. Herein, a novel organic anode material (tetrasodium 1,4,5,8-naphthalenetetracarboxylate, Na4TDC) has been developed with low redox potential (<0.7 V) and excellent cyclic stability. Its three-sodium storage mechanism was demonstrated with various in-situ/ex-situ spectroscopy and theoretical calculations, showing a high capacity of 208 mAh/g and an average decay rate of merely 0.022% per cycle. Moreover, the Na4TDC-hard carbon composite can further acquire improved capacity and cycling stability for 1200 cycles even with a high mass loading of up to 20 mg cm−2. By pairing with a thick Na3V2(PO4)3 cathode (20.6 mg cm−2), the as-fabricated full cell exhibited high operating voltage (2.8 V), excellent rate performance and cycling stability with a high capacity retention of 88.7% after 200 cycles, well highlighting the Na4TDC anode material for SIBs.

CNTs/Gr composite sandwich layered rare earth phthalocyanines MPcs (M = Yb, La) used as improved energy storage behaviors for lithium-ion batteries

To address the problem of aggregation and low electrical conductivity of rare earth phthalocyanines MPc (M = Yb, La), four composites are obtained by applying a physical method to combine two rare earth phthalocyanines with Gr/CNTs. These composites of rare earth phthalocyanines with Gr/CNTs effectively reduce the aggregation of phthalocyanine conjugated units and enhance the electrical conductivity. The electrochemical testing exhibits that the YbPc/CNTs electrode delivers a specific capacity of 1447 mAh/g after 275 cycles at a current density of 100 mA/g, demonstrating a capacity retention of 157.5 %. Similarly, the primitive specific capacity of LaPc/CNTs electrode is increasing from 515 mAh/g to 753 mAh/g at 100 mA/g after 400 cycles. Likewise, YbPc/Gr and LaPc/Gr electrodes have specific capacity of 912 mAh/g and 667 mAh/g after 450 cycles and 356 cycles, revealing capacity retention of 152 % and 74 %. It can be noted that compounding with Gr/CNTs can successfully solve the problems of a few exposures of redox-active sites caused by the aggregation of phthalocyanine conjugate units and poor rate performance owing to the sluggish ion/electrons transport of phthalocyanine, which furnishes a promising perspective for practical research and application of new organic anode materials in the field of superior electrochemical performance lithium-ion batteries.

Designing ester-ether hybrid electrolytes for aldehyde-based organic anode to achieve superior K-storage

Electrolyte engineering strategy has attracted high expectations for addressing the universally existed serious dynamics and thermodynamics issues in potassium-ion batteries (PIBs), especially for the batteries adopted with organic electrode materials. Herein, a new kind of ester-ether hybrid electrolytes (EEHEs) was developed with widely manipulatable solvation structures from solvent-separated ion pair (SSIP) to aggregate (AGG)-dominated states for PIBs. The optimized EEHEs of 5 M KFSI/EC+DME enabled high Coulombic efficiency and ultra-stable K plating/stripping stability in K||Cu cells and K||K symmetric cells, respectively. When the developed novel organic anode material of 2-Bromobenzene-1,3-dialdehyde/carbon nanotube (BBD/CNT) was matched with the 5 M KFSI/EC+DME electrolyte, it delivered a reversible capacity of about 288 mAh g−1 at 50 mA g−1 and approximately 244 mAh g−1 at 200 mA g−1 with negligible capacity fade. The excellent performance should be attributed to the surface capacitive-dominated mechanism with fast K-storage kinetics guaranteed by the AGG-dominated solvation structures.

Conjugated Enhanced Polyimide Enables High‐Capacity Ammonium Ion Storage

AbstractAqueous ammonium ion batteries (AIBs) have emerged as a promising next‐generation rechargeable battery due to their safety, sustainability, abundant resources, and superior electrochemical performance. However, organic anode materials, particularly polyimide anode materials, suffer from low specific capacity caused by limited active sites. Herein, the study has developed a micro‐granular‐structured π‐conjugated enhanced polyimide (PTPD) as the anode material for AIBs. The large π‐conjugated enhanced structure enables long‐range electron delocalization, decreased bandgap, and reduced spatial steric hindrance, resulting in increased active sites capable of storing NH4+ ions. PTPD exhibits reversible oxidation and reduction reaction in (NH4)2SO4 solution, delivering a high specific capacity of 206.67 mAh g−1 at a current density of 0.5 A g−1, exceptional rate capability, and excellent cycling stability with a capacity retention of 74.28% after 2500 cycles at a current density of 10 A g−1. Furthermore, theoretical simulations and materials analysis demonstrate that PTPD undergoes enol‐keto transformation of carbonyl groups, effectively capturing NH4+ to store charges. This study provides an effective strategy for designing polymer‐based AIBs anodes with high specific capacity and cycling stability.

Non-conjugated adipamide organic anode materials for high-performance lithium-ion capacitors

Lithium-ion capacitors (LICs) hold promise as next-generation energy storage devices due to the synergy of the advantageous features of lithium-ion batteries (LIBs) and supercapacitors (SCs). Recently, the use of nanostructured conjugated carboxylate organic anode materials in LICs has attracted tremendous attention due to their high capacity, excellent capacitive behavior, design flexibility, and environmental friendliness. Nevertheless, no studies have reported the use of non-conjugated organic compounds in LICs. In this study, we report for the first time that non-conjugated adipamide (ADIPAM) nanocrystals fabricated using a dissolution-recrystallization self-assembly technique serve as an excellent anode material for LICs. The unique ADIPAM nanocrystals–PVDF–Super P conductive integrated network architecture accelerates Li+ ion and electron diffusion and enhances lithium storage capability. Consequently, ADIPAM electrodes exhibit a high capacity of 705.8 mAh/g, exceptional cycling stability (308 mAh/g after 2100 cycles at 5 A/g), and remarkable rate capability. Furthermore, a LIC full cell comprising the ADIPAM anode with a porous activated carbon cathode demonstrates a wide working window (4.5 V), high energy density (238.3 Wh/kg), and superb power density (22,500 W/kg). We believe this work may introduce a new approach to the design of non-conjugated organic materials for LICs.

A DFT modeling of 4-cyclohexene-1,3-dione embedded in covalent triazine framework as a stable anode material for Li-ion batteries

Developing porous organic anode materials with outstanding electrical conductivity and high capacity is crucial to enhancing the performance of Li-ion batteries (LIBs). Herein, 4-cyclohexene-1,3-dione-functionalized covalent triazine framework (CYC-CTF0) monolayer as a new anode material in LIBs was explored through density functional theory calculations. The monolayer demonstrates good thermal, mechanical, and cycling stability and has a strong affinity for Li-ions to bind to the C=O and C=N redox-active sites. The adsorption of Li-ions transforms the CYC-CTF0 monolayer from being semiconducting to becoming metallic, reflecting its high electrical conductivity. Remarkably, the lattice undergoes a minimal expansion of 1.1 % throughout the charging and discharging process, suggesting an extended cycle life. The unit cell of the monolayer can be fully loaded with four Li-ions at different adsorption sites, exhibiting a specific theoretical capacity of 585.41 mAh g−1 and a low open-circuit voltage of 0.12 V. Moreover, the adsorbed Li-ions display a low diffusion energy barrier of 0.17 eV, enabling effective rates of charging and discharging. Our findings reveal the unique characteristics of the CYC-CTF0 monolayer as a promising anode material in LIBs.

Ultrastable Organic Anode Enabled by Electrochemically Active MXene Binder toward Advanced Potassium Ion Storage.

Conjugated carbonyl compounds are regarded as promising organic anode materials for potassium ion batteries (PIBs) due to their rich redox sites, excellent reversibility, and structural tunability, but their low electrical conductivity and severe solubility in organic electrolytes have substantially restricted their practical application. Herein, 2D MXene is utilized as an electrochemically active binder to fabricate perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) electrodes for high-performance PIBs. MXene, coupled with Super-P particles, served as a binder and conductive matrix to facilitate rapid ion and electron transport, restrain the solubility of PTCDA, promote potassium adsorption, and alleviate the volume expansion of PTCDA during potassiation. Consequently, the PTCDA electrode bonded by the MXene/Super-P system delivers excellent potassium storage performance in terms of a high capacity of 462 mAh g-1 at 50 mA g-1, superior rate capability of 116.3 mAh g-1 at 2000 mA g-1, and stable cycle performance over 3000 cycles with a low capacity decay rate of ∼0.0033% per cycle. When configured with the PTCDA@450 cathode, an all-PTCDA potassium ion full cell delivers a maximum energy density of 179.5 Wh kg-1, indicating the superiority of MXene as an electrochemically active binder to promote the practical application of organic anodes for PIBs.

Organic Anodes with Nearly 100% Initial Coulombic Efficiency Enabled by Wet‐Chemically Constructed Artificial Solid‐Electrolyte Interphase Film toward High‐Energy‐Density Organic Full Batteries

AbstractLithium‐ion batteries (LIBs) built on inorganic anodes have achieved great commercial success. By contrast, the practical application of organic anode materials encounters key bottlenecks including electronic insulation, high solubility, and poor initial coulombic efficiency (ICE). Among them, improving ICEs (normally 30–60%) faces enormous challenges in both theory and technology, and there has been no substantial breakthrough yet. Herein, a wet chemical pretreatment technology to increase the ICE of maleic acid (MA)‐based anodes from 43.2% to nearly 100% is proposed for the first time, and this strategy demonstrates universal applicability. Typically, the wet chemical pretreatment involves reacting with lithium‐biphenyl to form LixMA intermediates (x = 4–6) and further forming a compact artificial solid‐electrolyte interphase (SEI) film through the spontaneous reaction between active LixMA and battery organic electrolytes. This wet chemically‐constructed artificial SEI layer can almost completely suppress lithium loss in the initial cycle of the MA electrode and significantly boost the actual output energy density, rate capability, and cycling durability of MA anode‐based full batteries. Significantly, the study further demonstrated that a series of organic anode materials with high ICEs can be achieved through similar wet chemical pretreatment. This work will open up the true application of high‐ICE organic anodes in LIBs.

High-Performance Li-Organic Batteries Based on Conjugated and Nonconjugated Schiff-Base Polymer Anode Materials.

In recent years, organic materials have been increasingly studied as anode materials in lithium-ion batteries (LIBs) due to their remarkable advantages, including abundant raw materials, low prices, diverse structures, and high theoretical capacity. In this paper, three types of aromatic Schiff-base polymer materials have been synthesized and examined as anode materials in LIBs. Among them, the polymer [C6H4N = CHC6H4CH=N]n (TTD-PDA) has a continuous conjugated backbone (label as conjugated polymer), while polymers [(CH2)2N=CHC6H4CH=N]n (TTD-EDA) and [C6H4N=CH(CH2)3CH=N]n (GA-PDA) have discontinuous conjugated back-bones (label as nonconjugated polymer). The organic anodes based on TTD-PDA, TTD-EDA, and GA-PDA for LIBs are discovered to represent high reversible specific capacities of 651, 492, and 416 mAh g-1 at a current density of 100 mA g-1 as well as satisfactory rate capabilities with high capacities of 210, 90, and 178 mAh g-1 and 105, 57, and 122 mAh g-1 at current densities of 2 and 10 A g-1, indicating that these Schiff-base polymers are all promising anode materials for LIBs, which broadens the design of organic anode materials with high specific capacity, superior rate performance, and stable cycling stability.

Initiating a High‐Rate and Stable Aqueous Air Battery by Using Organic N‐Heterocycle Anode

AbstractAlkaline metal‐air batteries are advantageous in high voltage, low cost, and high safety. However, metal anodes are heavily eroded in strong alkaline electrolytes, causing serious side reactions including dendrite growth, passivation, and hydrogen evolution. To address this limitation, we successfully synthesized an organic N‐heterocycle compound (NHCC) to serve as an alternative anode. This compound not only exhibits remarkable stability but also possesses a low redox potential (−1.04 V vs. Hg/HgO) in alkaline environments. To effectively complement the low redox potential of the NHCC anode, we designed a dual‐salt highly concentrated electrolyte (4.0 M KOH+10.0 M KCF3SO3). This electrolyte expands the electrochemical stability window to 2.3 V through the robust interaction between the O atom in H2O molecule with the K+ of KCF3SO3 (H−O⋅⋅⋅KCF3SO3). We further demonstrated the K+ uptaken/extraction storage mechanism of NHCC anodes. Consequently, the alkaline aqueous NHCC anode‐air batteries delivers a high battery voltage of 1.6 V, high‐rate performance (101.9 mAh g−1 at 100 A g−1) and long cycle ability (30,000 cycles). Our work offers a molecular engineering strategy for superior organic anode materials and develops a novel double superconcentrated conductive salt electrolyte for the construction of high‐rate, long‐cycle alkaline aqueous organic anode‐air batteries.

Initiating a High-Rate and Stable Aqueous Air Battery by Using Organic N-Heterocycle Anode.

Alkaline metal-air batteries are advantageous in high voltage, low cost, and high safety. However, metal anodes are heavily eroded in strong alkaline electrolytes, causing serious side reactions including dendrite growth, passivation, and hydrogen evolution. To address this limitation, we successfully synthesized an organic N-heterocycle compound (NHCC) to serve as an alternative anode. This compound not only exhibits remarkable stability but also possesses a low redox potential (-1.04 V vs. Hg/HgO) in alkaline environments. To effectively complement the low redox potential of the NHCC anode, we designed a dual-salt highly concentrated electrolyte (4.0 M KOH+10.0 M KCF3 SO3 ). This electrolyte expands the electrochemical stability window to 2.3 V through the robust interaction between the O atom in H2 O molecule with the K+ of KCF3 SO3 (H-O⋅⋅⋅KCF3 SO3 ). We further demonstrated the K+ uptaken/extraction storage mechanism of NHCC anodes. Consequently, the alkaline aqueous NHCC anode-air batteries delivers a high battery voltage of 1.6 V, high-rate performance (101.9 mAh g-1 at 100 A g-1 ) and long cycle ability (30,000 cycles). Our work offers a molecular engineering strategy for superior organic anode materials and develops a novel double superconcentrated conductive salt electrolyte for the construction of high-rate, long-cycle alkaline aqueous organic anode-air batteries.

Machine learning-assisted high-throughput screening of transparent organic light-emitting diode anode materials

A target-driven material design framework for the rapid work function prediction of AB-type 2D nanomaterials is proposed to accelerate the discovery of transparent OLED anode materials.

Organoboron-thiophene-based polymer electrodes for high-performance lithium-ion batteries.

Polymer electrodes are drawing widespread attention to the future generation of lithium-ion battery materials. However, weak electrochemical performance of organic anode materials still exists, such as low capacity, low rate performance, and low cyclability. Herein, we successfully constructed a donor-acceptor thiophene-based polymer (PBT-1) by introducing an organoboron unit. The charge delocalization and lower LUMO energy level due to the unique structure enabled good performance in electrochemical tests with a reversible capacity of 405 mA h g-1 at 0.5 A g-1 and over 10 000 cycles at 1 A g-1. Moreover, electron paramagnetic resonance (EPR) spectra revealed that the unique stable spin system in the PBT-1 backbone during cycling provides a fundamental explanation for the highly stable electrochemical performance. This work offers a reliable reference for the design of organic anode materials and expands the potential application directions of organoboron chemistry.

Insights into Perylene-Tetra-Carboxylate Derivatives as Versatile Anode Materials for Alkali-Metal-Ion Batteries

The use of organic molecules as novel electrode materials potentially paves the way for the design of better and more sustainable batteries. Herein, the successful synthesis and comprehensive characterization of the alkali perylene tetra-carboxylate derivatives PCT-Li4, PTC-Na4, and PTC-K4 is reported. These conjugated carbonyl compounds are among the most promising organic electrode materials at present, since they can achieve high energy and power density as well as very good cycling stability. All materials were electrochemically tested vs. Li, Na, and K metal electrodes. A capacity of up to 120 mAh g-1 matching a two-electron redox reaction was obtained in all cases. The “crossover tests” with charge carriers not present in the pristine molecules demonstrate the great versatility of such materials. Moreover, ex situ FT-IR and operando XRD measurements were conducted to gain a deeper understanding of the influence not only of the charge carrier, but also of the initial crystal structure on the different charge storage mechanisms, as simulations for PTC-Li4 vs. Li indicate a decisive role of the initial crystal structure and, thus, contribute to the further development of organic batteries. References Dühnen, S. et al. Toward Green Battery Cells: Perspective on Materials and Technologies. Small Methods 4, 2000039 (2020).Song, Z. & Zhou, H. Towards sustainable and versatile energy storage devices: an overview of organic electrode materials. Energy & Environmental Science 6, 22 80–2301 (2013).Iordache, A. et al. From an Enhanced Understanding to Commercially Viable Electrodes: The Case of PTCLi4 as Sustainable Organic Lithium-Ion Anode Material. Advanced Sustainable Systems 1, 1600032 (2017).

A Pyrazine‐Pyridinamine Covalent Organic Framework as a Low Potential Anode for Highly Durable Aqueous Calcium‐Ion Batteries

AbstractRechargeable aqueous calcium‐ion batteries (CIBs) are promising for reliable large‐scale energy storage. However, they face significant challenges, primarily stemming from suboptimal anodes, resulting in unfavorable voltage profiles, limited capacity, and diminished durability, all of which hinder the development of CIBs. Here, a covalent organic framework (PTHAT‐COF) featuring repeated pyrazine and pyridinamine units, employed as the anode material for aqueous CIBs, is introduced. This innovative approach results in a remarkably flat ultralow potential plateau ranging from −0.6 to −1.05 V (vs Ag/AgCl), attributed to the high level of the lowest unoccupied molecular orbital. Furthermore, the PTHAT‐COF anode exhibits outstanding rate performance (152.3 mAh g−1 @ 1 A g−1), exceptional long‐term cycling stability, and remarkable capacity retention (10 000 cycles with 89.9% retention). Mechanistic studies, including experimental and theoretical calculations, reveal that C═N active sites reversibly trap Ca2+ ions via chemisorption during the discharging/charging process. The PTHAT‐COF demonstrates exceptional structural stability throughout cycling. Finally, by pairing PTHAT‐COF with a high‐voltage manganese‐based Prussian blue cathode, a complete aqueous CIB with a voltage interval of 2.2 V is achieved, exhibiting extraordinary durability (10 000 cycles with 83.6% retention). This research illuminates the potential of organic anode materials in aqueous batteries to achieve higher battery voltages.

Synthesis of Nitrogen-Conjugated 2,4,6-Tris(pyrazinyl)-1,3,5-triazine Molecules and Electrochemical Lithium Storage Mechanism

Organic anode materials for lithium-ion battery have attracted widespread attention due to their diversity in organic linker functional species and the ability to tune their molecular levels. However, the rational design of advanced organic anodes with high reversible capacity and intentional organic molecular design requires a deep understanding of their mechanism for use in small-molecule organic rechargeable batteries. Herein, an optimized small-molecule-based organic anode material containing highly efficient active sites was developed for use in an organic lithium-ion battery. A small-molecule organic compound, 2,4,6-tris(pyrazinyl)-1,3,5-triazine (TPT), was formed by the trimerization of the 2-cyanopyrazine monomer. This molecule was rationally designed and evaluated as a lithium-ion battery organic anode material. TPT has a relatively small structure, but a superior reversible specific capacity was still achieved. Excitingly, TPT2 (liquid-phase synthetic) released a reversible capacity of 622 mAh g–1 at 100 mA g–1. Moreover, impressive long-term cycling performance was obtained, with a storage capacity of 541 mAh g–1 at 800 mA g–1 after 500 cycles. This demonstrated the durable cyclic stability of TPT2, which also achieved excellent rate performance at different current densities from 100 mA g–1 to 1.6 A g–1. The lithium storage mechanism of TPT was studied by theoretical calculations and ex situ Fourier transform infrared spectroscopy (FTIR) combined with X-ray photoelectron spectroscopy (XPS) characterization, which demonstrated that multiple active sites consisting of −C–N and −C═N groups were responsible for its superior lithium storage performance. This study provides a new understanding of the energy storage mechanism in small-molecule organic-based anode electrodes.

Advanced Anode Materials for Rechargeable Sodium-Ion Batteries.

Rechargeable sodium-ion batteries (SIBs) have been considered as promising energy storage devices owing to the similar "rocking chair" working mechanism as lithium-ion batteries and abundant and low-cost sodium resource. However, the large ionic radius of the Na-ion (1.07 Å) brings a key scientific challenge, restricting the development of electrode materials for SIBs, and the infeasibility of graphite and silicon in reversible Na-ion storage further promotes the investigation of advanced anode materials. Currently, the key issues facing anode materials include sluggish electrochemical kinetics and a large volume expansion. Despite these challenges, substantial conceptual and experimental progress has been made in the past. Herein, we present a brief review of the recent development of intercalation, conversion, alloying, conversion-alloying, and organic anode materials for SIBs. Starting from the historical research progress of anode electrodes, the detailed Na-ion storage mechanism is analyzed. Various optimization strategies to improve the electrochemical properties of anodes are summarized, including phase state adjustment, defect introduction, molecular engineering, nanostructure design, composite construction, heterostructure synthesis, and heteroatom doping. Furthermore, the associated merits and drawbacks of each class of material are outlined, and the challenges and possible future directions for high-performance anode materials are discussed.

A plastics-derived organic anode material for practical and sustainable potassium-ion batteries

Organic electrode materials are of particular interest for storing large-size potassium ions. Herein, we demonstrate that polyethylene terephthalate (PET), a synthetic organic polymer with functional carbonyl groups, could deliver a two-electron redox mechanism for potassium storage. The PET particles, synthesized from PET plastic film by a simple solvent thermal method, achieve almost complete utilization of redox-active sites, providing a reversible capacity of 273 mAh/g. Over 800 cycles of cycling life are demonstrated by the PET, along with fast K+-transport kinetics and thus outstanding rate performance. Furthermore, a fabricated full cell composed of PET anode can provide a high operating voltage of 3.17 V with a high energy density of 245 Wh/kg. This study offers a new way to utilize PET plastic waste and guide the development of organic anode for low-cost potassium-ion batteries.

Self-assembled nanostructures of PDI-bolaamphiphiles as anode materials for advanced rechargeable Na-ion batteries

Organic electrode materials become more attractive for sodium-ion batteries (NIBs) owing to their structural flexibility, and eco-friendly nature. However, currently, they were confronted with less capacity and poor cycle stability. Herein, we synthesize various nanoarchitectures from PDI-bolaamphiphiles by employing a simple self-assembly strategy and exploited them as anode materials for NIBs. The simple structural mutation of amino acid side chain had shown a significant impact on morphology and performance of the battery. The NF (Nanofiber) electrode delivered a high average specific capacity of 271 mAh g−1 at a current density of 50 mA g−1 and displayed a remarkable rate performance and delivered exceptional capacity retention of 97% after 200 cycles. In addition, it was also surpassed the majority of organic anodes by retaining a capacity of 85%, after 1000 charge-discharge cycles, at a high current density of 1 A g−1. The mechanism of sodiation and desodiation during the charge-discharge process was revealed by qualitative and quantitative analysis. Altogether, the nanofiber structure of NF electrode enhances the electrochemical properties by accelerating sodication/de-sodication potentials and the carboxylic group reduces its solubility in the organic electrolyte, ensuring it a potential material for greener, sustainable, highly stable organic anode material for NIBs.