ENERGY & FUELS
·
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
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Wenhui Tu,Zewei Chen,Yuanpeng Cao,Jianguo Duan,Jingjing He,Runlin Li,Peng Dong,Xianshu Wang,Yingjie Zhang,Ding Wang
Olivine-structured LiMnPO 4 -based cathodes have generated enormous development prospects due to their high energy density , good structural stability , and low cost. However, their scale of application is limited by high electronic and ionic insulativity. In this study, we designed and synthesized a bi-functional interfacial modified composite, 0.9LiMnPO 4 @0.1LiFePO 4 /C ( [email protected] /C ), using mechanochemical activation-assisted hydrothermal technology. The innovative Li-storage structure consists of a high-energy density LiMnPO 4 (LMP) core, a uniformly coated LiFePO 4 (LFP) layer with improved ionic conductivity as the secondary outer shell, and an in-situ coated carbon film with high conductivity as the outermost functional skin. As anticipated, the [email protected] /C composite exhibits outstanding Li-storage properties, demonstrating discharge capacities as high as 157.1 mAh g −1 and 146.7 mAh g −1 at 0.1 C and 1 C rates, respectively. Moreover, it exhibits an ultrahigh capacity retention of 92.5 % after 500 charge and discharge cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2025
·
IF 8.6
Yawen Gao,Luxiang Ma,Shuaifei Zhao,Chunxi Hai,Tiandong Chen,Junyi Zhang,Yan Zhao,Yanxia Sun,Shengde Dong,Xin He,Qi Xu,Xiaowang Wu,Caixiong Quan,Hongli Su,Yuan Zhou
Cost-effective and efficient lithium extraction technology is vital to foster the growth of lithium industry. This paper proposed a novel approach for the high value utilization of spent LiFePO 4 (S-LiFePO 4 ) in the field of lithium extraction from salt lakes was proposed using spent LiFePO 4 (S-LiFePO 4 ) as raw material. The anode, made from spent LiFePO 4 , is prepared via a sintering process, while FePO 4 , obtained through chemical oxidation, is used as the cathode. Compared with commercial LiFePO 4 , this system not only reduces the cost but also greatly shortens the preparation time of FePO 4 (only about 10min is required). And the electrochemical extraction system had a favorable lithium extraction capacity (29.25 mg/g) from actual brine, reducing the Mg/Li ratio from 61.4 to 0.8. This study not only achieved the low-cost preparation of electrode materials and facilitated the large-scale implementation of this process, but also proposed a high-value comprehensive utilization strategy for lithium-ion batteries recycling.
研究领域:
材料科学
·
环境工程
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Jiachun Xiong,Zhongwei Zhao,Dongfu Liu,Lihua He
In this study, a novel high-efficient approach of directly extracting lithium from the Da Qaidam artificial raw brine (the main components: Li + 0.10 g·L -1 , Na + 82.34 g·L -1 ) by LiFePO 4 /FePO 4 material through the chemical redox method was proposed. The extraction process demonstrated a fast reaction speed and expected lithium adsorption capacity which reached 9.13 mg·g −1 , and the whole process could be online monitored by measuring the solution’s redox potential and pH value. Besides, the adsorption process exhibited excellent ion selectivity while the separation coefficient of lithium towards sodium , potassium , and magnesium reached 8704, 2460, and 6864 respectively. This extraction method features high efficiency, facile and continuous operation, and provides an alternative pathway to directly extract lithium from raw brines.
研究领域:
材料科学
·
环境工程
✓ 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
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 45
·19315-19323
·
IF 0
Chunli Gong,Fangli Deng,Chi-Pong Tsui,Zhigang Xue,Yun Sheng Ye,Chak-Yin Tang,Xingping Zhou,Xiaolin Xie
The poor electronic conductivity and low lithium ion diffusion rate of a LiFePO4 cathode material are the two major obstacles for its commercial applications in the power lithium ion batteries. This article utilized an electroactive and ion conductive copolymer, polyaniline–poly(ethylene glycol) (PANI–PEG), to modify carbon-LiFePO4 (cLFP) by a facile in situ chemical copolymerization method. The structure and morphology of the cLFP/PANI–PEG composite were confirmed by Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Compared with a cLFP/PANI composite, the cLFP/PANI–PEG composite exhibited a more uniform and full polymer coating layer. Furthermore, this cLFP/PANI–PEG cathode material exhibits excellent cyclic stability (95.7% capacity retention after 100 cycles at 0.1 C) and high rate capability (125.3 mA h g−1 at 5 C) as the PANI–PEG copolymer coating layer facilitated electron and ion transport within the electrode. Electrochemical impedance spectroscopy (EIS) proved that the lithium ion diffusion in the cLFP/PANI–PEG composite was increased significantly by one order of magnitude compared with cLFP, indicating its possibility to be served as a cathode material for high-performance lithium ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Shuai Heng,Qiang Shi,Xueying Zheng,Yan Wang,Qunting Qu,Gao Liu,Vincent S. Battaglia,Honghe Zheng
Carbon coating technologies for olivine-structured LiFePO 4 have been successfully commercialized in lithium ion industries. However, up to today, there are still many challenges overcoming the low intrinsic ionic conductivity and surface instability limitations. Herein, we propose a lithium ion conductive organic-skinned secondary coating technique by applying sodium maleate onto the surface of a commercial carbon-coated LiFePO 4 cathode. Very distinctive features of the organic skin secondary coating are highly uniform and continuous. More importantly, the abundant carbonyl groups on the LFP surface facilitates facial Li ion transport. The nanostructure tuned organic layer is able to effectively suppress the undesired side reactions at the electrode/electrolyte interface. With 6.0 wt% of the sodium maleate coating, rate capability and long-term cycling behavior of the LiFePO 4 cathode at different temperatures are significantly improved. Notably, the well-known impedance rise of LFP cathode with increasing electrochemical cycles is effectively suppressed. An insight into the mechanisms of the secondary sodium maleate coating on the carbon-coated LiFePO 4 cathode is discussed.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INTEGRATED FERROELECTRICS
·
2022
·
IF 0.836
Yuanchao Cheng,Lei Zhou,Xiaolan Cai,Xudong Cui,Shaopeng Wu,Wenhao Pan,Wenhao Li
In this paper, high-energy ball milling method was used to prepare LiFePO4/C precursor and high temperature solid phase method to prepare LiFePO4/C cathode material. The influence of mixing process on the electrical performance and synthesis temperature of LiFePO4/C cathode material was studied by changing the ball milling time.The ball milling time selected in this paper is 0, 0.5, 1, 1.5, 2 h, and XRD, SEM and particle size analysis are used to characterize the properties of LiFePO4/C powder. The research results show that the LiFePO4/C powder obtained under the ball milling time of 1 h has the smallest particle size and uniform distribution. The XRD results also show that the LiFePO4/C phase obtained under this condition has good purity and crystallinity.The electrical performance of the LiFePO4/C material prepared after high-energy ball milling are tested. The results show that the first discharge specific capacity at 0.2 C rate is 163.3 m·Ah/g, which is 19.7% higher than that of the non-ball milled sample.The TG-DTA curve results show that the reaction temperature of the sample after high-energy ball milling is 454 °C, and the mass loss ends at about 570 °C. Compared with the sample without ball milling, the reaction temperature is reduced by 60 °C.The results of this study show that the preparation of precursor by high-energy ball milling can effectively improve the electrical performance of LiFePO4/C materials and reduce the material synthesis temperature.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
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
·
环境科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2014
·
IF 2.112
Borong Wu,Yonghuan Ren,Daobin Mu,Xiaojiang Liu,Guchang Yang,Zhe Sun
Sodium chloride (NaCl), as an attractive electrolyte additive , was added in a low temperature electrolyte to investigate its effect on LiFePO 4 electrode. A capacity as high as 115 mAh g − 1 was delivered at 2 C, which was 20 mAh g − 1 more than its NaCl free counterpart. Cyclic voltammetry (CV) tests showed that the polarization of electrode reaction decreased. SEM and XPS measurements were conducted and the result illustrated that the film was modified by NaCl to be uniform containing less resistive LiF, so the transport of Li + through the film was facilitated. Moreover, the conductivity of Li + through electrolyte was also enhanced in the presence of NaCl. NaCl effectively facilitated lithium ion transport rate to the electrode surface and improved the lithiation/delithiation behavior in the LiFePO 4 electrode.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yuyun Li,Qingfeng Liu,Wanquan Yu,Chenchen Li,Zitong Fei,Qi Meng,Peng Dong
The wide application of LiFePO 4 (LFP) batteries in energy storage equipment inevitably produces a large number of spent LFP batteries. However, the existing direct regeneration technology usually only pays attention to the compensation of Li + , ignoring the problems of poor conductivity, binder residue, and slow compensation channels of Li + in spent LFP. Here, we introduce a direct, efficient, and environmentally sustainable regeneration method of spent LFP cathodes, which utilizes argon plasma ball milling to effectively decompose the residual binder on the surface, induce the construction of vacancies in the carbon layer, and broaden the Li + compensation channels. Through argon plasma ball milling pretreatment, the Fe (III) phase can be more effectively transform into the Fe (II) phase during the calcination stage, achieving structural repair of spent LFP. The regenerated LFP exhibits excellent electrochemical performance, with the discharge capacity of 142.9 mAh g −1 at 1C, with no significant capacity loss after 200 cycles, and nearly 100 % capacity retention after 500 cycles at 5C. Economic analysis indicates that the proposed regeneration method offers significant economic benefits and low energy consumption, providing a novel reference for the efficient direct regeneration of spent lithium-ion batteries.
研究领域:
材料科学
·
环境科学
·
能源工程
✓ 已验证
产品关联
DOI
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
·
能源存储技术
·
环境工程
✓ 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）