Advanced Sustainable Systems
·
2024
·Vol. 8
·期 8
·2400098
·
IF 6.5
Fuyu Xiao,Wenbin Lai,Shihan Zeng,Lingjun He,Mingyang Ge,Fenqiang Luo,Peixun Xiong,Hui Lin,Chuyuan Lin,Yongjin Luo,Jixiang Zhang,Qingrong Qian,Qinghua Chen,Lingxing Zeng
The resource scarcity and pollution leakage risk caused by discarding the spent power lithium-ion batteries has aroused growing concern. Recovering and regenerating the cathode material from spent power lithium-ion batteries in an easy and environmentally friendly manner remains a significant challenge and an area of focus in battery research. Hence, a green and convenient method to recover FePO 4 from spent LiFePO 4 cathode powder by using Na 2 S 2 O 8 as an oxidizer and as cathode materials for lithium/sodium-ion batteries (LIBs/SIBs) is reported. Benefiting from the remarkable graphene oxide (GO) and vanadium oxide (V 2 O 5 ) coating, the regenerated FePO 4 –V 2 O 5 –graphene oxide (FePO 4 –V 2 O 5 –GO) is suitable for Li/Na storage (153 mAh g −1 at 0.2C/118 mAh g −1 at 0.5C). The high capacity retention, that stable for 300 cycles in LIBs and 300 cycles for SIBs, is also realized due to the stable structure. This work provides a green strategy for regenerating the cathode of spent lithium-ion batteries and designing cathodes of alkali metal ion batteries.
研究领域:
材料科学
·
电化学
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能源存储
·
环境科学
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资源回收
·
纳米材料
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电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Shihan Zeng,Qinxin Xu,Hongjun Jin,Lingxing Zeng,Yiyi Wang,Wenbin Lai,Qi Yao,Jixiang Zhang,Qinghua Chen,Qingrong Qian
Owing to the growing concern about the resource shortage and environmental pollution caused by the vast usage of lithium-ion batteries, the recycle of spent lithium-ion power batteries in electric vehicles becomes urgent. Herein, we report a one-pot method to recover FePO 4 from spent LiFePO 4 cathode powder through advanced oxidation , which is further successfully used as cathode materials of lithium/sodium-ion batteries (LIBs/SIBs) for the first time. With this facile method, the electrochemical performance can be further improved by simply optimizing FePO 4 with graphene oxide coating. The optimized FePO 4 -graphene oxide (FePO 4 -GO) exhibits enhanced electrochemical performances of 145 mAh g −1 at 0.5 C for LIBs and 75 mAh g −1 at 0.1 C for SIBs , as well as high capacity retention (144 mAh g −1 at 1 C after 300 cycles for LIBs ; 61 mAh g −1 at 1 C after 300 cycles for SIBs). We expect that our current work will provide a facile and green strategy to recover LiFePO 4 material from spent batteries.
研究领域:
材料科学
·
储能
·
电化学
·
可持续化学
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电池技术
✓ 已验证
DOI
高影响因子
WASTE MANAGEMENT
·
2020
·
IF 5.448
Jai Kumar,Xing Shen,Bo Li,Huizhou Liu,Junmei Zhao
To recycle the sharply growing spent lithium-ion batteries and alleviate concerns over shortages of resources, particularly Li, is still an urgent issue. In this work, an organic acids based leaching approach at room temperature is proposed to recover Li and FePO 4 from spent LiFePO 4 cathode powder. The coexistent metal ions, Cu and Al, have also been investigated. Citrus fruit juices, rich in organic acids, such as citric acid and malic acid, have been used as leaching agents in this work. Among lemon, orange and apple, lemon juice shows the best leaching effect based on its suitable pH of the reaction system. Under the optimized conditions, the leaching rates of Li, Cu and Al can reach up to 94.83%, 96.92% and 47.24%, while Fe and P remain as low as 4.05% and 0.84%, respectively. Li 2 CO 3 and FePO 4 can be recovered from the leachate and the leaching residue, respectively. The recovered FePO 4 was used to prepare new cathode material LiFePO 4 . The crystalline carbon, present in the spent LiFePO 4 cathode scraps, has a significant effect on the electrochemical performances of the regenerated LiFePO 4 . The regenerated LiFePO 4 cathode material delivered a comparable discharge capacity of 155.3 mAh g −1 at 0.1C and rate capacity to the fresh LiFePO 4 . For the cycling stability, it displays capacity retention of 98.30% over 100 cycles at 1 C with a fading rate of 0.017% per cycle. The proposed organic acids-based recycling strategy is much benign for recycling the spent LiFePO 4 cathode materials.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Tongbao Zhang,Xin-Bing Cheng,Qiang Zhang,Yangcheng Lu,Guangsheng Luo
Using amorphous FePO 4 ( a -FePO 4 ) nanoparticles with a high purity, a narrow size distribution and good dispersion , we successfully developed a new strategy to generate a uniformly dispersed a -FePO 4 -CNT nano-composite using the interface interaction between surface-modified a -FePO 4 and CNT dispersion under mild sonication . The uniformly dispersed a -FePO 4 -CNT nano-composite exhibited the best performance and long-term stability as a cathode material in a lithium-ion battery compared to previously reported results. The developed nano-composite could deliver a theoretical specific capacity at 0.1 C, 162 mAh g −1 at 1 C and 117 mAh g −1 at 5 C. No capacity fading was observed at 1 C after 500 cycles, and nearly 90% of the initial discharge capacity could be retained at 5 C after 2000 cycles. This study confirms the validity of the proposed strategy to construct a cathode structure, and also describes the potential of a -FePO 4 for building high-power energy-storage and conversion systems.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 35
·10429-10435
·
IF 0
Peng Yan,Lei Lu,Xiao-min Liu,Yin Cao,Zhi-peng Zhang,Hui Yang,Xiao-dong Shen
A novel, economic and scalable method is proposed in this context using an impinging jet reactor to continuously precipitate FePO4 (FP) nanoparticles with high purity. The LiFePO4/C (LFP/C) nano-composites synthesized from the FP, lithium and carbon sources show fast charge capability and excellent power performance. The generated FP and LFP/C are characterized with X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and inductively coupled plasma (ICP) spectrometry. The LFP/C nano-composites are cycled at various C-rates to explore the electrochemical performance. When the pH of the working solution is 1.3, the molar ratio of Fe to P equals 1 in the obtained amorphous FP. In addition, the precipitation mechanism is discussed. Compared to the amorphous FP, the hexagonal FP obtained after calcining the former one is preferred to synthesize high power LFP/C. It is proved that 2 mol% excess LiOH is needed to compensate for the possible loss of Li during calcination. With 4.4 wt% of in situ carbon coating, the LFP/C nano-composites exhibit 145 mA h g−1 at 10 C (1.7 A g−1, 6 min) charge (without floating charge) and discharge, without obvious capacity loss up to 100 cycles, which is among the best high power performances reported so far. This strategy offers an inexpensive and easy control method to mass-produce high quality LFP/C nano-composites which might be suitable for powering hybrid electric vehicles and plug-in hybrid electric vehicles.
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
产品关联
DOI
SOLID STATE IONICS
·
2025
·
IF 3.3
Yongsheng Chen,Siman Yang,Jianbin Zheng,Mingwei Hu,Mingdeng Wei,Peixun Xiong
As an excellent cathode material, lithium iron phosphate (LiFePO 4 ) has been widely used in commercial lithium-ion batteries (LIBs). However, the impact of synthetic conditions on LiFePO 4 cathode derived from amorphous iron phosphate (FePO 4 ) remains underexplored. In the present study, the effects of Li/P molar ratio on the crystallinity and electrochemical properties of LiFePO 4 were investigated in detail using FePO 4 as a precursor. When the Li/P molar ratio in LiFePO 4 was approximately 1, the material exhibited an excellent long-term cycling stability with a high capacity retention of 97 % after 500 cycles. In addition, multiple characterizations demonstrate that the higher molar ratio of the Li/P resulted in the higher concentration of defects in LiFePO 4 crystals, which not only reduced the reversible capacity but also compromised the structural stability, leading to a poor cyclic stability and quick capacity degradation. Therefore, such a work could provide a scientific insight for rational design and synthesis of high-performance LiFePO 4 cathodes from amorphous FePO 4 precursor.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Tuan Wang,Xinlan Wang,Wei Lyv,Xiaobo Sun,Jinxuan Chen,Enhao Xu,Kaipeng Wu,Yun Zhang
With the large-scale application of LiFePO 4 batteries in electric vehicles and energy storage, the recycling of spent LiFePO 4 cathode materials is receiving increasing attention. Hydrometallurgical derived full-component separation strategy has been verified as the most capable recycling process for LiFePO 4 cathode. During which, complete elements (i.e., Li, Fe and P) are dissolved into a solution of excessive acidic leachate, and subsequently separated to obtain battery-grade FePO 4 ·2H 2 O and lithium salt, enabling high element recovery rates of up to 100 %. However, the use of excessive leaching agent leads to high acidity of the leaching solution (pH < 0.8), which brings a necessary of pH regulation prior to the regeneration of FePO 4 ·2H 2 O, markedly complicating the succedent separation and purification. In this investigation, a practical method for directly regenerating FePO 4 ·2H 2 O from H 2 SO 4 -based full-component leaching solution is proposed. In this process, H 2 SO 4 as leaching agent is used to digest LiFePO 4 completely, and then Fe and P are premeditatedly recovered from the extremely acidic filtrate (pH < 0.8) as FePO 4 ·2H 2 O via direct precipitation without any pH regulator. Consequently, there are no extra impurities affecting the recovery of Fe and P during regeneration. The regeneration behavior of FePO 4 ·2H 2 O under extremely acidic condition are investigated and the growth mechanism is also clarified by monitoring the overall microstructure and phase evolutions. The results demonstrate that the above regeneration is found to be an exponential growth process driven by the quantity of nucleation site, and meanwhile influenced by the dissolution-reprecipitation equilibrium of amorphous iron phosphate. Specifically, the process can be accelerated by introducing FePO 4 ·2H 2 O or amorphous iron phosphate to increase the nucleation sites. Additionally, the primary nanosheet size of regenerated FePO 4 ·2H 2 O causes a smaller primary particle size of the corresponding LiFePO 4 /C material, contributing to its better physical and electrochemical properties. This work provides a guidance for the direct regeneration of FePO 4 ·2H 2 O from excessive acidic leachate and has potential industrial applications.
✓ 已验证
产品关联
DOI
高影响因子
HYDROMETALLURGY
·
2022
·
IF 4.217
Zhihe Cao,Baozhong Ma,Chengyan Wang,Bingding Shi,Yongqiang Chen
Currently, with the increasing demand of nickel and cobalt, more and more attention has been placed on hydrometallurgical processing to treat laterite ore. The nitric acid pressure leaching (NAPL) has several advantages. In order to solve the problems of environmental pollution and resource wastage caused by the NAPL residue, this work proposes a novel and green process for treating laterite residue to prepare high-purity iron phosphate. The laterite residue was subjected to selective leaching by 6.0 mol L −1 phosphoric acid . The pregnant leach solution (PLS) was used to prepare iron phosphate by induced precipitation. The selective leaching was conducted using 6.0 mol L −1 H 3 PO 4 of to obtain high extraction of iron. After leaching and clarification of PLS iron phosphate was precipitated in two steps by controlling temperature and pH, to yield more than 94% iron phosphate. The reaction mechanism of the induced precipitation was analyzed, which illustrated that intermediate products were first formed from the leach liquor and then transformed to FePO 4(s) . Characterization of the iron phosphate showed that the product displayed flowerlike morphology with high purity and dispersion. This process not only solves the serious environmental damage by accumulation and landfill of laterite residue, but also improve the efficiency of resource utilization for the hydrometallurgical nickel laterite industry.
研究领域:
冶金学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）