Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 23
·6170-6180
·
IF 6.367
Jijun Lu,Junhao Liu,Xuzhong Gong,Zhi Wang
Silicon is considered to be the most promising candidate for the anode of high energy density lithium-ion batteries. Nanometerization has been proven to be an effective method for improving the stress accumulation caused by the volume expansion of silicon. However, new issues such as poor initial coulombic efficiency (ICE) need to be solved because nanostructure silicon has an increased specific surface area. Here, a doping modification strategy is developed by a solvothermal combined with low-pressure gas–solid conversion reaction, and innovatively formed an Fe3C/N co-doped carbon coating on the nano-silicon surface. The doping of Fe3C in the composite material can catalyze the formation of a thin and stable solid electrolyte interphase (SEI) on the electrode surface and serve as a framework to stabilize the electrode structure during charge and discharge. As a result, Fe3C doping can significantly increase the ICE of the electrode from 66.4% to 87.1%, and the stable efficiency exhibited a rapid increase upwards of 99.5% after only 6 cycles including the first formation cycle, compared to the non-doped structure. The modified nano-silicon with Fe3C doping can provide high reversible capacity (1443.3 mA h g−1 after 200 cycles at 0.2 A g−1) and long cycle life (74% capacity retention after 1000 cycles at 0.5 A g−1).
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
Small
·
2025
·Vol. 21
·期 19
·2501524
·
IF 12.1
Si Yi,Zhilin Yan,Yiming Xiao,Cuicui Ye,Huangjie Qiu,Jingwen Zhang,Pengpeng Ning,Deren Yang,Ning Du
Silicon monoxide (SiO) has garnered significant attention as a promising anode material for high-energy-density lithium-ion batteries due to its lower volume expansion relative to pure silicon (Si) and its higher capacity compared to graphite. Nevertheless, the poor intrinsic electronic/ionic conductivity and the low initial Coulombic efficiency (ICE) of SiO result in inferior rate capability and inadequate practical energy density, hindering its commercial viability. Here, a simultaneous prelithiation and in situ nitrogen (N) doping approach for SiO utilizing lithium nitride (Li 3 N), which significantly enhances both the ICE and lithium-ion (Li + ) diffusion kinetics, is proposed. N atoms are not only incorporated into the carbon layer on the surface of SiO but also form a uniformly distributed amorphous Li 2 SiN 2 phase within the SiO, facilitating Li + transport. Molecular dynamics simulations demonstrate that the Li + diffusion coefficient of amorphous Li 2 SiN 2 is significantly higher than that of other crystalline phases present in the prelithiated SiO matrix. The 1.5 Ah pouch cells further validate that the SiON-0.175/graphite||NCM811 exhibits a high ICE of 88.06%, and it retains 51.5% of its capacity even under 4C fast charging conditions. This study offers new insights into the development of next-generation SiO anode materials with high ICE and high-rate performance.
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Usman Ghani,Nousheen Iqbal,Ahmed A. Aboalhassan,Chenxin Zhou,Bowen Liu,Jinghan Li,Yan Fang,Tabish Aftab,Jiajun Gu,Qinglei Liu
The use of porous hard carbons (PHCs) as electrode materials in sodium-ion batteries has great potential; however, the exposure of large surface areas to electrolyte flow results in irregular and irreversible solid electrolyte interfaces (SEIs), leading to deteriorated ionic and electronic mobility and inferior initial Coulombic efficiency (ICE). These issues can be addressed through suitable structural modifications of PHC materials. Herein, the integration of high-surface-area PHCs with carbon nanofibers (CNFs) was accomplished by a simple electrospinning technique, which resulted in a uniform and reversible SEI layer. In the meantime, the CNFs’ mesh provided connectivity and conductivity in the as-integrated electrodes, whereas PHCs offered fast diffusion kinetics and high Na+ ion storage capacity. Additionally, PHC integration with CNFs demonstrated an excellent ICE of 77% and a specific capacity of 505 mAh/g at 25 mA/g. Furthermore, the conjugated microstructure also provided flexibility and stability to the electrode (260 mAh/g after 500 cycles). This remarkable synergy may promote the development of free-standing, flexible, and highly porous properties in a single material for advanced energy storage applications.
研究领域:
材料科学
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电化学
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能源存储
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纳米材料
·
电池技术
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Wang Yao,Qiang Li,Peng Qin,Jun Qian,Xuli Ding
An efficient interface and composition modification strategy is proposed to significantly increase the rate capacity and initial Coulombic efficiency (ICE) of SnO anodes via energy band structure modulation for Na-ion batteries (SIBs). The as-fabricated SnO@Bi@C material with Bi nanocrystals homogeneously dispersed on and around the SnO surface is prepared by an electrospinning method. The excellently dispersed Bi nanocrystals realize an effective interface contact with SnO and Na2O, which effectively lowers the electron conduction barriers and promotes sodium-ion release and transport upon the desodiation process, increasing the rate capacity and ICE of the SnO anode. The prepared SnO@Bi@C exhibits a much higher rate capacity up to 10 A g–1, except an improved ICE of 80.67%, compared to 57.38% of SnO@C. Importantly, the intercalation of Na+ between layer-structured Bi galleries provides a good basis for excellent cycle stability due to the highways constructed inside the prepared composites. This finding provides an effective tactic to establish ion transport high-speed channels, which essentially increase the rate performance and the ICE of the SnO-based anodes.
研究领域:
材料科学
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电化学
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能源存储
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纳米材料
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固态物理
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电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Wenjie He,Wei Xu,Zhigang Li,Yansheng Sun,Jingzeng Gu,Xinxin Cao,Kangsheng Huang,Min Zhang,Jiangmin Jiang
The large-scale development of low-cost silicon monoxide (SiO) anode is limited due to its low initial Coulombic efficiency (ICE) and poor cycle stability. Herein, the Ge x SiO (1-x) (0
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ChemElectroChem
·
2024
·Vol. 11
·期 15
·e202400326
·
IF 3.5
Run Zhu,Siyuan Liu,Tongtao Li,Dong Yang
Graphical Precisely prelithiation not only enhances the mechanical properties of PAA binders but also provides extra Li for electrode to form a stable SEI layer, thus improving electrochemical performance of micron-sized silicon anodes for lithium-ion batteries. Among those prelithiated PAAs (LiPAAs), LiPAA-3 exhibits the best adhesion and strength, leading to a remarkable reversible capacity and an excellent ICE of Si−LiPAA-3 electrode. Silicon, serving as an anode material of Li-ion batteries, offers a theoretical capacity significantly higher than graphite, but its practical application is hindered by poor conductivity, low lithium ion diffusivity, and severe volumetric expansion. Here, a simple and eco-friendly methodology is proposed to synthesize precisely prelithiated polyacrylic acid binder, optimizing the interface between the binder and micron Si particles. The incorporation of these binders not only mitigates the detrimental effects of volumetric expansion but also enhances mechanical strength, and ionic conductivity of the anode, significantly improving the initial Coulombic efficiency (ICE), cycling stability, and rate performance of micron-sized Si anodes. This study not only highlights the potential of prelithiated binders in overcoming the limitations of micron-sized Si anodes but also sets a new benchmark for the development of high-capacity, eco-friendly Li-ion batteries.
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xiaoqin Liu,Yu Xiang,Qingping Li,Qiaoji Zheng,Na Jiang,Yu Huo,Dunmin Lin
Bimetallic sulfides are considered as one of the most promising anode materials for sodium ion batteries (SIBs) due to their high conductivity and electrochemical activity. However, they still suffer from challenges such as large volume changes, low initial coulombic efficiency and poor cycling performance. Herein, we synthesize SnS 2 -CoS 2 @C (SCS@C) core-shell nanocubes with abundant mesopores through simple carbon coating and sulfidation strategies using polymeric resorcinol-formaldehyde as carbon source. The porous nanostructure of SCS@C is conducive to shortening the transport path of sodium ions and facilitating the infiltration of electrolyte, while the carbon shell can buffer volume expansion stress during charging and discharging processes. As a result, the SCS@C electrode exhibits an excellent sodium storage: an outstanding initial coulomb efficiency of 92.8%, remarkable cycling performance of 662 mAh g −1 at 100 mA g −1 after 70 cycles with extremely low capacity decay of 0.00013% per cycle, and long cycle durability of 402.5 mAh g −1 at 5 A g −1 over 500 cycles. Our study provides a viable strategy for the rational design of bimetallic sulfides anode materials with high efficiency and long term stability for sodium storage.
研究领域:
材料科学
·
能源存储
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产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Wangui Chen,Weitong Pan,Lili Zhao,Longfei Tang,Lu Ding,Xueli Chen,Fuchen Wang
Low specific surface area (SSA) in hard carbon anodes is crucial for enhancing the initial Coulombic efficiency (ICE) and reversible capacity of sodium-ion batteries (SIBs). Conventional strategies for SSA reduction within high-temperature carbonization processes often rely on additional energy-intensive thermal treatments or complex processes, presenting significant barriers to practical application. This study introduces a simplified and effective approach that operates within a standard high-temperature framework (1300 °C) by solely controlling the packing thickness of coconut shell char (CSC) precursors. Increased packing thickness induces diffusional resistance, hindering volatile release and achieving a volatile release reduction of 7.68 %. This confinement effect promotes in-situ secondary cleavage of volatiles, accelerating carbon deposition and reducing surface defects. Consequently, SSA decreases significantly by 71.52 %, while closed pore formation is enhanced. The optimized CSC-HPT-1300 exhibits dramatically improved electrochemical performance over the low-packing-thickness control, achieving a 15.48 % higher ICE (85 %), a 15.39 % increase in reversible capacity (280 mAh g −1 ), and a 25.90 % enhanced plateau capacity (209 mAh g −1 ). Furthermore, this strategy concurrently increases carbonization mass yield by 4.64 %. This thickness-controlled carbonization presents a straightforward and scalable optimization to standard high-temperature processing for fabricating low-surface-area hard carbons, advancing sustainable SIBs development.
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产品关联
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Yi Tang,Junwei He,Jiao Peng,Juan Yang,Zhenyu Wu,Peng Liu,Kangjie Zhou,Sihua Hu,Liang Hu,Xianyou Wang
Biomass-derived hard carbon exhibits remarkable potential as an anode material for sodium-ion batteries (SIBs) owing to its inexpensive cost, availability of resources, and excellent electrochemical performance. However, the relatively low initial Coulombic efficiency (ICE) significantly confines the realistic application of hard carbon anode materials in SIBs. In this work, corncob-derived hard carbon (CDHC) materials were synthesized from biomass waste corncob. It has been found that the interlayer spacing of the synthesized hard carbon material is greater than 0.37 nm, which clearly surpasses the layer spacing of graphite. This larger layer spacing is favorable for the intercalation and deintercalation ability of sodium ions during the charging and discharging processes. When CDHC is applied by the anode of sodium-ion batteries, it shows excellent sodium storage performance, with a maximum reversible capacity of approximately 311 mAh g–1 and the first Coulombic efficiency close to 80%.
研究领域:
材料科学
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电化学
·
能源存储
·
可持续材料
·
电池技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Lankun Shi,Rongji Jiao,Haimei Liang,Yue Zhao,Boyu Sun,Dawei Lan,Kun Liu,Xiaoxia Chen,Zhongmin Lang,Jinlong Cui
SnS 2 has attracted widespread research attention as an anode material for sodium-ion batteries (SIBs) because of its excellent theoretical specific capacity. Unfortunately, its practical application is hindered by its inherently low conductivity, substantial volume expansion during cycling, and particularly the unsatisfactory initial Coulombic efficiency (ICE). Here, carbon particles from walnut shells were anchored onto SnS 2 microspheres composed of interwoven nanosheets via a one-step hydrothermal method to synthesize SnS 2 /C composites. C particles on the surface of SnS 2 microspheres can effectively mitigate structural degradation caused by volume expansion during (dis)charge cycles. The incorporation of amorphous C helps maintain the structural integrity of SnS 2 and facilitates the formation of a stable solid electrolyte interphase (SEI) film. Furthermore, it reduces the binding energy between Sn and Na 2 S, thereby enhancing the reversibility of SnS 2 regeneration during the charging process. In addition, carbon particles suppress the sulfur shuttle effect through both chemical and physical interactions. Consequently, the synthesized SnS 2 /C composite demonstrates a substantial specific capacity of 621.2 mAh g -1 along with an enhanced ICE of 88.4 % at 0.1 A g -1 . Moreover, it exhibits an excellent cycling stability, retaining a specific capacity of 432.9 mAh g -1 after 950 cycles at 2.0 A g -1 . The enhanced Na + storage capability of SnS 2 /C anode contributes to the outstanding rate performance and cycling durability of constructed SIB full cell, indicating its promising applicability in high-performance practical scenarios.
研究领域:
储能
·
材料科学
·
电化学
·
纳米技术
·
电池技术
✓ 已验证
DOI
高影响因子
CARBON
·
2022
·
IF 11.307
Haoran Da,Jin Li,Jiateng Shi,Haitao Zhang
Spent graphite (SG) anodes are extensively overlooked despite being a potential anode material on account of their relatively low cost when compared to the valuable metal elements of cathode materials . However, the cracked surface structure and unstable solid electrolyte interphase (SEI) of SG will lead to depressed initial Coulombic efficiency (ICE), which hampers the application of graphite recovery techniques. Here, a uniform layer of TiNb 2 O 7 nanoparticles is successfully constructed on a damaged SG surface. Benefiting from the stable structure, the TiNb 2 O 7 coating can effectively protect the cracked sites and enhance Li + diffusion. In addition, this layer can provide a high Li + insertion potential and effectively suppress the unfavorable formation of an unstable SEI. The TiNb 2 O 7 coating can also provide extra capacity, compensating for the capacity fade of SG. After modification, the regenerated graphite not only exhibits enhanced rate performance by means of reconstructed Li + transfer channels but also demonstrates a prolonged cycle life due to the stabilized bulk structure. A full cell containing LiFePO 4 and a regenerated graphite anode shows a high capacity retention, namely, 89.0% after 500 cycles at 1C. This study obtains regenerated graphite with a high ICE, thereby promoting the reutilization of spent graphite anodes.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 6
·3111-3119
·
IF 2.4
Teng Zeyu,Wang Zhilong,Li Zhongcheng,Chen Kanghua
Silicon is a strong competitor for the anode of the next generation of lithium-ion batteries, and ball-milled silicon has broad prospects as a low-cost method for preparing nano silicon. In order to match ball-milled silicon, it is imperative to develop better bonding agents with lower costs. Through adding amino silane coupling agent, the performance of ball-milling silicon anode is enhanced. This study explored the network structure formed by amino silane coupling agent with different chain lengths and polyacrylic acids. Herein, the crosslinked network prepared with 3-[2-(2-aminoethyl amino) ethyl amino] propyl-trimethoxysilane as coupling agent had the best performance, and the initial discharge capacity of the silicon anode prepared by this binder reached 3297.4 mAh·g −1 at a constant current density of 0.5A·g −1 , the initial Coulomb efficiency reached 92.25%. After 100 cycles, the discharge capacity of anode was still maintained at 2229.5 mAh·g −1 with excellent charge/discharge performance.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
高分子化学
·
表面改性
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DOI
高影响因子
危险品化学品经营许可证（带存储）