International Journal of Electrochemical Science
·
2023
·
IF 1.5
Wenliang Sun,Rusi Hao
Herein, porous activated carbon was synthesized from highland barley straw by phosphoric acid activation and used as a conductive agent for LiFePO 4 cathodes. The morphology and microstructure are characterized by scanning electron microscopy and nitrogen adsorption and desorption. The results show that the porous activated carbon convenient three-dimensional porous microstructure. Compared with the conventional conductive agent carbon black Super P, the obtained porous activated carbon presents a high capacity of 153.63 mA h g -1 at 0.1 C, as well as an excellent rate performance and cycling stability. The simple method for the preparation of porous activated carbon as a conductive agent with an excellent electrochemical performance opens up a new opportunity of LiFePO4 cathodes for widespread applications in lithium-ion batteries.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Meiting Huang,Zhihao Wang,Haitao Yang,Liming Yang,Kechun Chen,Haoxuan Yu,Chenxi Xu,Yingying Guo,Penghui Shao,Liang Chen,Xubiao Luo
The direct regeneration method, recognized for its cost-effectiveness, has garnered considerable attentions in the field of battery recycling. In this study, a novel direct regeneration strategy is proposed to repair spent LiFePO 4 (S-LFP) cathodes without the need for impurity removal. Instead, the residual conductive carbon and polyvinylidene fluoride (PVDF) in S-LFP are employed as inherent reductive agents. Systematic characterization and analysis reveal that the failure of S-LFP primarily originates from a substantial loss of Li + and the conversion of LiFePO 4 to FePO 4 . Meanwhile, it is demonstrated that both residual conductive carbon and PVDF play positive roles in promoting the regeneration of S-LFP through distinct mechanisms. As a result, the regenerated LFP exhibits significant recovery in crystal structure and chemical composition as compared to S-LFP, which leads to notably improved lithium storage performance. Furthermore, to further enhance the lithium storage property, a specific amount of glucose (10 %) is introduced during the regeneration of S-LFP, yielding a regenerated product that performs comparably to commercial LFP. Clearly, our approach, in contrast to traditional regeneration methods, maximizes the utilization of residual impurities within S-LFP, resulting in effective regeneration of S-LFP, thereby proving both informative and cost-effective.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 14
·46132
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IF 1.86
Jiarong He,Haoxiang Zhong,Lingzhi Zhang
Terpene resin (TS) emulsion has been adopted as a tackifier in lithium polyacrylate (PAALi) as water-soluble binder for LiFePO 4 (LFP) cathode in Li-ion batteries. TS–PAALi composite binder with optimal ratio of 1:1 (denoted as TS1–PAALi1), shows improved flexibility and enhanced adhesion capability of 0.170 N/cm in comparison with 0.120 N/cm of PAALi after introducing TS as adhesion enhancing agent, which is comparable with that of nonaqueous poly(vinylidene difluoride) (PVDF, 0.171 N/cm) and much better than aqueous sodium carboxymethyl cellulose (CMC, 0.045 N/cm). The electrochemical characteristics of LFP with TS1–PAALi1 have been investigated and further compared with those of PAALi, CMC, and PVDF. LFP with TS1–PAALi1 exhibits superior cycling stability and rate capability, maintaining 65.57% capacity of 0.2 C at 5 C rate in comparison with 60.73%, 57.83%, and 34.79% for PAALi, CMC, and PVDF, respectively. In addition, LFP with TS1–PAALi1 displays excellent cycling performance almost without any capacity fading at 60 °C after 45 cycles at 1 C, much better than that of PAALi, CMC, and PVDF. Cyclic voltammetry and electrochemical impedance spectroscopy reveal that LFP with TS1–PAALi1 has a smaller redox potential difference, lower electrode polarization, and a more favorable electrochemical kinetics (fast lithium diffusion rate) than that of PAALi, CMC, and PVDF, thus more superior electrochemical performances. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46132.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Xiang-lan Ming,Ruizi Wang,Teng Li,Xixi Wu,Liang-jie Yuan,Yu Zhao
The micro–nano-structured FePO4·2H2O was prepared from mixed solution of FeSO4 oxidized in diluted H3PO4 with H2O2 and NaOH solution in the turbulent flow cycle state at 90 °C. The resulting products were characterized by thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Constant current charge/discharge tests were adopted to investigate the electrochemical performance and the rate capability (from 0.1C to 5C) of the carbon-coated LiFePO4 composite materials prepared from the micro–nano-structured FePO4. The carbon-coated LiFePO4 composite materials deliver a high specific discharge capacity of 153.7 mAh·g–1, exhibit excellent cycle performance with 98.6% of the capacity retained after 30 cycles. This study demonstrates that the turbulent flow cycle method may be an economical and effective method for industrial production of fine and uniform micro–nano-structured FePO4·2H2O particles for LiFePO4 cathode materials for Li-ion batteries.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Menghang Sun,Xinyu Zhou,Lili Li,Bo Wen,Yunzi Miao,Xiaofeng Liu,Wei Yan,Guorui Yang,Shujiang Ding
Recycling spent cathode materials is crucial for sustainably developing lithium-ion battery technology. To achieve the high-value utilization of spent LiFePO 4 (LFP) cathodes, this paper proposes a method for preparing MIL-100(Fe) based on solid waste residues from spent LFP cathodes. R-FeS 2 @C derived from MIL-100(Fe) can serve as an anode material for potassium-ion batteries featuring a porous structure. Electrochemical tests demonstrate that the R-FeS 2 @C exhibits more stable cycling performance compared with the FeS 2 @C derived from the traditional MIL-100(Fe), reaching 525 mAh g −1 after 100 cycles at a current density of 100 mA g −1 . Impressively, R-FeS 2 @C also showcases excellent rate performance (343 mAh g −1 specific capacity at 5 A g −1 ). Furthermore, full cells assembled with PI@rGO cathodes also exhibit excellent rate performance and stable cycling performance. The porous structure of R-FeS 2 @C provides numerous voids to accommodate volume changes and introduces sufficient channels for electrolyte penetration. The higher carbon content enhances the electrical conductivity improving the kinetics of the K + migration reaction. These researches can provide guidance for the recycling of spent lithium-ion batteries and the design of sulfide electrodes for PIBs.
研究领域:
材料科学
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能源存储技术
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
·
IF 11.2
Hao Xu,Shuai Liu,Zhiang Li,Fan Ding,Weimin Wang,Kaikai Song,Ting Liu,Lina Hu
All-solid-state lithium batteries (ASSLBs) are important for enhancing safety across various applications related to lithium-ion batteries (LIBs). Lithium iron phosphate (LiFePO 4 ) is a widely utilized commercial cathode in LIBs, prized for its stable cycling performance, thermal stability, and low cost. However, low electronic conductivity and slow ion diffusion kinetics limit its application at high rates and low temperatures. Herein, Ti 3 C 2 T x MXene nanosheets (NSs) are introduced into the LiFePO 4 cathode. The continuous electron-conducting networks are constructed due to the high electrical conductivity of Ti 3 C 2 T x NSs. Meanwhile, the coordination environment of lithium ions in the cathode is weakened by the oxygenated end groups of Ti 3 C 2 T x NSs, and thus efficient ion-percolating networks are constructed. Therefore, the ionic and electronic conductivities of the modified cathode are significantly improved. Assembled all-solid-state LiFePO 4 /Li full cells with poly(ethylene oxide) as electrolyte exhibits high initial discharged capacities of 91.5 mAh g −1 at 10 C, and capacities of 155.1 mAh g −1 after 1000 cycles at 1 C with a retention rate of 93.8%. Furthermore, the cells still deliver excellent performance at high loading, room temperature, and low temperature. This work offers a facile and scalable strategy for designing high-performance ASSLBs.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Dongyu Hou,Jian Chen,Fengning Bai,Fanming Meng,Peng Dong,Chengxu Zhang,Yingjie Zhang,Jue Hu
Recently, the increase in lithium-ion batteries has led to a significant rise in battery scrapping, raising concerns of environmental pollution and resource waste. Therefore, regenerating these discarded lithium-ion batteries has become urgent. In this work, we propose a cost-effective and efficient LiFePO 4 cathode material regeneration technology with nitrogen-doping capabilities. Through plasma discharge, high-energy particles interact with the material's surface, initiating reactions that promote nitrogen-doping. Additionally, the reduction of Fe 3+ impurities to Fe 2+ enhances Li + embedding, thereby inhibiting Fe/Li inversion and achieving structural repair in the process. The regenerated LiFePO 4 , used as the cathode material, exhibits high capacity and cycle performance. It achieves a discharge capacity of 160.2 mA h g −1 at 0.1C and maintains about 146 mA h g −1 at 1C over 200 cycles without significant degradation. Furthermore, the regeneration time is nearly five times shorter than traditional methods. This method's low cost and short processing time provide crucial support for the recycling of waste cathode materials.
研究领域:
材料科学
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环境科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
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2024
·
IF 9.7
Jingxin Li,Ailin Wang,Weihao Xiang,Shiwei Liu,Lu Li,Qiong Wu,Yue Liu,Yuxiang Liu,Genkuo Nie,Shuangxi Nie,Shuangquan Yao,Hailong Yu
Lithium carboxymethyl cellulose (CMC-Li) is a promising novel water-based binder for lithium-ion batteries. The direct synthesis of CMC-Li was innovatively developed using abundant wood dissolving pulp materials from hardwood (HW) and softwood (SW). The resulting CMC-Li-HW and CMC-Li-SW binders possessed a suitable degree of substitutions and excellent molecular weight distributions with an appropriate quantity of long- and short-chain celluloses, which facilitated the construction of a reinforced concrete-like bonding system. When used as cathode binders in LiFePO 4 batteries, they uniformly coated and dispersed the electrode materials, formed a compact and stable conductive network with high mechanical strength and showed sufficient lithium replenishment. The prepared LiFePO 4 batteries exhibited good mechanical stability, low charge transfer impedance, high initial discharge capacity (∼180 mAh/g), high initial Coulombic efficiency (99 %), excellent cycling performance (<3% loss over 200 cycles) and good rate capability, thereby outperforming CMC-Na and the widely used cathode binder polyvinylidene fluoride.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
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2023
·
IF 5.3
Jintao Jia,Longping Deng,Huajian Shentu,Mengmeng Wang,Ya-Jun Cheng,Xiuxia Zuo,Jie Gao,Yonggao Xia
In recent years, the large consumption of lithium-ion batteries (LiBs) has caused resource waste and environmental pollution. It is crucial to recycle and reuse LiBs, especially the valuable elements from the spent LiBs. In this research, a new, sustainable, and easy-to-implement process for the recycling of spent LiFePO4 cathode powder is proposed. 732 cation exchange resin is used as a leaching agent and an adsorbent to leach and adsorb Li and Fe from the spent LiFePO4 powder. The effects of various parameters, such as the cathode scrap-to-resin ratio (1/9), time (35 min), water addition (30 mL), and reaction temperature (30 °C), on the resin leaching and adsorption of the waste LiFePO4 cathode powder have been investigated. The effect of acid concentration on the elution rate during resin elution and experiments on the recyclability of the resin has been carried out as well. The results indicate that it is technically and economically feasible and environmentally friendly to use the 732 cation exchange resin to recover the waste LiFePO4 cathode powder. Products including high-purity Li2CO3 (99.95%), Fe2O3, and high-purity phosphoric acid can be obtained based on this process, through which a full component recovery with a high recovery rate was achieved. We investigated the reaction of kinetic analysis and also explored the effect of reaction conditions on the reaction. In contrast to previous studies on spent LiFePO4 cathode powder, our approach is promising and is analyzed as follows: (1) the 732 cation exchange resin has a dual role in the recycling process of used LiFePO4 cathode powder (leaching-adsorption) in the used LiFePO4 cathode powder recycling process. (2) The separation of the valued metals and the phosphoric acid can be achieved in one step using the 732 cation exchange resin.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Minghao Sun,Haoxiang Zhong,Shuren Jiao,Hanqi Shao,Lingzhi Zhang
Carboxymethyl chitosan (C-CTS) was firstly reported as a water soluble binder for LiFePO 4 cathode in Li-ion batteries. The electrochemical performances of LiFePO 4 cathode with C-CTS binder was investigated and compared with the conventional water-soluble sodium carboxymethyl cellulose (CMC) and the commercial non-aqueous polyvinylidene difluoride (PVDF). LiFePO 4 cathode with C-CTS exhibited a comparable cycling performance, but better rate capability than that of CMC and PVDF, retaining 65% capacity of C/5 at 5 C rate as compared with 55.9% and 39.4% for CMC and PVDF, respectively. In addition, LiFePO 4 cathode with C-CTS exhibited excellent cycling performance at 60 °C, retaining 91.8%/62.1% capacity after 80 cycles at 1 C/10 C, respectively.
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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高分子化学
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电池技术
✓ 已验证
DOI
高影响因子
ChemElectroChem
·
2020
·Vol. 7
·期 24
·4963-4970
·
IF 4.154
Dongyang Qu,Zhonghui Sun,Shiyu Gan,Lifang Gao,Zhongqian Song,Huijun Kong,Jianan Xu,Xiandui Dong,Li Niu
Graphical The 2D structured Fe 2 O 3 /TiO 2 composite nanoplates offers open channels for favorable ion and electron transports. The combination of TiO 2 with a steady structure further provides sufficient volume fluctuation space for Fe 2 O 3 . Fe 2 O 3 /TiO 2 nanoplates as an anode material thus exhibit favorable rate and cycle performances for lithium-ion batteries compared with Fe 2 O 3 . After assembled with LiFePO 4 cathode, the full cell also demonstrates stable cycle capacity (132 mAh g −1 at 0.1 A g −1 after 150 cycles). The rapid capacity decay is one of the challenges for the anodes of metal oxides-based lithium-ion batteries (LIBs). Herein, we report a characteristic nanoplate-structured metal oxide anode consisting of hexagonal Fe 2 O 3 and TiO 2 (denoted as Fe 2 O 3 /TiO 2 ) via a facile hydrothermal strategy. Owing to two-dimensional (2D) structured and stable TiO 2 modifier, Fe 2 O 3 /TiO 2 composite demonstrates significantly improved electrochemical LIBs performances. The Fe 2 O 3 /TiO 2 composite material buffers the volume expansion of Fe 2 O 3 and improves the rate capability and cycling performances. Upon 1000 long-term cycles, the anode electrode delivers high discharge capacity of 1056 mAh g −1 at 0.5 A g −1 . The full cell that is composed of Fe 2 O 3 /TiO 2 as the anode and commercial LiFePO 4 as the cathode delivers superior rate capacity (84 mAh g −1 at 2 A g −1 ) and stable cycle capacity (132 mAh g −1 at 0.1 A g −1 after 150 cycles). This 2D composite nanostructure offers an approach to improve the metal oxide-based anodes of LIBs.
研究领域:
材料科学
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电化学
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纳米技术
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Green Energy & Environment
·
2023
·
IF 13.3
Rui Zhang,Biao Chen,Yuhan Ma,Yue Li,Junwei Sha,Liying Ma,Chunsheng Shi,Naiqin Zhao
Solid polymer electrolytes (SPEs) are highly promising for realizing high-capacity, low-cost, and safe Li metal batteries. However, the Li dendritic growth and side reactions between Li and SPEs also plague these systems. Herein, a fluorinated lithium salt coating (FC) with organic-inorganic gradient and soft–rigid feature is introduced on Li surface as an artificial protective layer by the in-situ reaction between Li metal and fluorinated carboxylic acid. The FC layer can improve the interface stability and wettability between Li and SPEs, assist the transport of Li ions, and guide Li nucleation, contributing to a dendrite-free Li deposition and long-lifespan Li metal batteries. The symmetric cell with FC-Li anodes exhibits a high areal capacity of 1 mAh cm −2 at 0.5 mA cm −2 , and an ultra-long lifespan of 2000 h at a current density of 0.1 mA cm −2 . Moreover, the full cell paired with the LiFePO 4 cathode exhibits improved cycling stability, remaining 83.7% capacity after 500 cycles at 1 C. When matching with the S cathode, the FC layer can prevent the shuttle effect, contributing to stable and high-capacity Li–S battery. This work provided a promising way for the construction of stable all-solid-state lithium metal batteries with prolonged lifespan.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）