Polymers
·
2021
·Vol. 13
·期 22
·3992
·
IF 4.329
Jinshan Mo,Dongmei Zhang,Mingzhe Sun,Lehao Liu,Weihao Hu,Bing Jiang,Lihua Chu,Meicheng Li
Nickel cobalt manganese ternary cathode materials are some of the most promising cathode materials in lithium-ion batteries, due to their high specific capacity, low cost, etc. However, they do have a few disadvantages, such as an unstable cycle performance and a poor rate performance. In this work, polyethylene oxide (PEO) with high ionic conductance and flexibility was utilized as a multifunctional binder to improve the electrochemical performance of LiNi0.6Co0.2Mn0.2O2cathode materials. Scanning electron microscopy showed that the addition of PEO can greatly improve the adhesion of the electrode components and simultaneously enhance the integrity of the electrode. Thus, the PEO-based electrode (20 wt% PEO in PEO/PVDF) shows a high electronic conductivity of 19.8 S/cm, which is around 15,000 times that of the pristine PVDF-based electrode. Moreover, the PEO-based electrode exhibits better cycling stability and rate performance, i.e., the capacity increases from 131.1 mAh/g to 147.3 mAh/g at 2 C with 20 wt% PEO addition. Electrochemical impedance measurements further indicate that the addition of the PEO binder can reduce the electrode resistance and protect the LiNi0.6Co0.2Mn0.2O2cathode materials from the liquid electrolyte attack. This work offers a simple yet effective method to improve the cycling performance of the ternary cathode materials by adding an appropriate amount of PEO as a binder in the electrode fabrication process.Keywords:binder;ternary cathode material;lithium-ion battery;electrochemical performance
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2023
·Vol. 29
·期 5
·1721-1729
·
IF 2.8
He Tao,Dai Junjie,Dong Yangtao,Zhu Fangshun,Wang Chao,Zhen Aigang,Cai Yurong
The increasing lithium-ion batteries (LIBs) market causes concerns about environmental issues and the mining of the earth’s metallic minerals. The harmless treatment of the spent LIBs and the effective recovery of scarce metal resources are gradually given high priority worldwide. In this article, p-toluenesulfonic acid-based deep eutectic solvents (DESs) are prepared to leach metal components from spent ternary LIBs. And the ternary LiNi 0.5 Co 0.2 Mn 0.3 O 2 material is regenerated through the co-precipitation method and high-temperature solid phase method. The results show that 97.96% of Li, 99.46% of Ni, 100% of Co, and 100% of Mn can be leached out again under the optimum conditions. The synthesized ternary material possesses an excellent reversible capacity (139.0 mAh·g −1 at 0.5 C) and an adequate long-cycle stability (123.6 mAh·g −1 after 100 cycles). This work provides an efficient and clean approach to recycling spent LIBs and has great potential application in the field of battery sustainability.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Processes
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2023
·Vol. 11
·期 6
·1756
·
IF 3.5
Lipeng Xu,Chunjiang Bao,Haobing Zhou,Jun Li
Nickel-rich ternary cathode materials (NRTCMs) have high energy density and a long cycle life, making them one of the cathode materials of LIB that are currently receiving much attention. However, it has shortcomings such as poor cycling performance (CP) and a high-capacity decay rate. Because of this, the study analyzed the modification effect of WO3on NRTCM lithium batteries by preparing WO3-modified poly-crystal and single-crystal NCM622 materials under the existing conditions of better original cathode materials as reference samples. The results showed that in the morphology and structure testing, with the increase of WO3addition, the c/a values of all NCM622-WO3samples were greater than 4.95. In the analysis of cycling and rate performance (CRP), as W increased, the rate performance (RP) of the NCM622-W4.0 sample had a discharge specific capacity ratio of 86.2% at 10.0 C/1.0 C. In cyclic voltammetry testing, when the addition amount of WO3was 1.0%, the polarization degree of SC-NCM622 sample was the weakest. In the AC impedance test, after six cycles, compared with the original sample, the Ret and R + Rct values of the NCM622-W sample modified with WO3showed a significant downward trend. The above results prove that WO3modification can lower the polarization of the material, effectively raising the CRP of the battery. It provides a reference path for the further progress of high capacity and stability ternary cathode materials.Keywords:lithium battery;nickel rich ternary cathode materials;tungsten trioxide;modification;preparation
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Shuaishuai Chen,Hua Li,Yihan Tang,Jingkun Yan,Zhaoxin Lu,Yi Wan,Chun Jiang,Xiaoyi Wang,Xiong Zhao,Zhenlian Chen,Jiliang Wu,Deyu Wang
Bulky substitutions with transition-metal elements are widely used to improve the comprehensive performance of ternary oxide cathodes. As the Ni content increases to 90% and higher, the modification strategies should be reconsidered since the regular remedies have difficulty addressing their inherent drawbacks. Here, we propose the influence of vanadium substitution, which is rarely used in bulky substitution. This modification obviously improves the durability of LiNi0.90Co0.05Mn0.05O2 at high rate and slightly lowers its reversible capacity. As the best sample, the 2% V-substituted sample delivers 174.4 mA h/g in the first cycle and still maintains 72.5% in the 200th cycle under 5 C, respectively. This variation should be dependent on the abated Δc during operation and the enhanced Li+ diffusion coefficient. Furthermore, the ameliorated mechanical behavior is further proved by the intact particles of the 2% V-substituted sample after 200 cycles. Our results demonstrate that vanadium substitution should be one of the potential strategies to modify Ni-rich materials due to their complementarity.
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
Batteries-Basel
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2024
·Vol. 10
·期 6
·179
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IF 4.6
Hui Wang,Zejia Wu,Mengmeng Wang,Ya-Jun Cheng,Jie Gao,Yonggao Xia
With the rapid development of new energy vehicles and energy storage industries, the demand for lithium-ion batteries has surged, and the number of spent LIBs has also increased. Therefore, a new method for lithium selective extraction from spent lithium-ion battery cathode materials is proposed, aiming at more efficient recovery of valuable metals. The acid + oxidant leaching system was proposed for spent ternary positive electrode materials, which can achieve the selective and efficient extraction of lithium. In this study, 0.1 mol L−1H2SO4and 0.2 mol L−1(NH4)2S2O8were used as leaching acid and oxidant. The leaching efficiencies of Li, Ni, Co, and Mn were 98.7, 30, 3.5, and 0.1%, respectively. The lithium solution was obtained by adjusting the pH of the solution. Thermodynamic and kinetic studies of the lithium leaching process revealed that the apparent activation energy of the lithium leaching process is 46 kJ mol−1and the rate step is the chemical reaction process. The leaching residue can be used as a ternary precursor to prepare regenerated positive electrode materials by solid-phase sintering. Electrochemical tests of the regenerated material proved that the material has good electrochemical properties. The highest discharge capacity exceeds 150 mAh g−1at 0.2 C, and the capacity retention rate after 100 cycles exceeds 90%. The proposed new method can extract lithium from the ternary material with high selectivity and high efficiency, reducing its loss in the lengthy process. Lithium replenishment of the delithiation material can also restore its activity and realize the comprehensive utilization of elements such as nickel, cobalt, and manganese. The method combines the lithium recovery process and the material preparation process, simplifying the process and saving costs, thus providing new ideas for future method development.
研究领域:
材料科学
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环境工程
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
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2025
·Vol. 56
·期 1
·13
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IF 3
Zhang Weijian,Han Jiaxing,Zhao Yuhui,Zhang Wei,Bao Yingqing,Wu XiaoZhen,Zhen Aigang,Zhu Binglong,Zhang Chunqiang,Qin Hengfei,Zhuang Yan
The rapid expansion of the lithium-ion battery market has intensified the need for recycling and regeneration of used lithium-ion batteries. The present research aimed to directly regenerate secondary agglomerated particles derived from spent lithium nickel cobalt manganese oxide (LiN 0.5 Co 0.2 Mn 0.3 O 2 ) cathode materials into single-crystal particles by employing a ternary molten salt mixture composed of lithium hydroxide, lithium carbonate, and sodium sulfate. The effects of calcination temperature (800 ℃, 850 ℃, and 900 ℃) and calcination duration (10, 12, and 14 h) on the electrochemical performance of the regenerated materials were investigated. Electrochemical evaluation indicated that calcination at 850 °C for 12 h yielded a discharge-specific capacity of 116.7 mAh g⁻¹ during the first cycle at a rate of 1 C (1 C = 160 mAh g⁻¹) and maintained a capacity retention of 84.4% after 400 cycles at 1 C. The regeneration process effectively restored the layered crystal structure of the cathode material, and the regenerated samples exhibited electrochemical properties comparable to those of commercial single-crystal counterparts, confirming the feasibility of using ternary molten salts for direct regeneration of spent lithium nickel cobalt manganese oxide cathodes. Graphical
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DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2022
·Vol. 50
·期 7
·100101
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IF 1.193
Ranehipura Dewage Lahiru SANDARUWAN,Bo-Yu WANG,Suwanda Arachchige Don Rumesh MADHUSANKA,Shun-Chao MA,Hong-Yu WANG
Transition to aqueous electrode fabrication of lithium ion batteries (LIBs) with green binder is certainly profitable and imperative in terms of economic benefit and environmental wellness. However, aqueous processing of cathode in LIB, especially the ternary LiNi x Co y Mn z O 2 (NCM), is still problematic and novel water-soluble binder should be developed to boost the electrochemical performances of cathode. In this regard, commercially available white latex (WL), cooperating with CMC (carboxymethyl cellulose), is employed as water-processable binder mixture for manufacturing NCM cathode. Interestingly, the prepared NCM cathode assisted by WL/CMC mixture exhibits improved electrochemical performances including better initial reversible capacity of 161.7 mAh g −1 at 0.5 C current density, long-term cyclability with a reversible capacity of 155 mAh g −1 along with high-capacity retention of around 96% after cycling 200 times, and even excellent rate capability, which are superior to those of the conventional counterpart base on polyvinylidene fluoride (PVdF). Moreover, the NCM|graphite full cell, which is absolutely based on this novel WL binder, also demonstrates the outstanding electrochemical behaviors.
研究领域:
电化学
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能源材料
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锂电池技术
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高分子材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2023
·Vol. 170
·期 1
·010523
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IF 3.9
Jinshang Song,Lingzhi Zhu,Yudong Li,Enshan Han,Qi Zhang,Gaojun Chen,Ziqiang Zhang,Xiaohui Yang,Yanzhen He
As one of the fastest-growing cathode materials, Nickel-rich layered cathode material has caused much attention in the "next-generation" Li-ion batteries (LIBs) owning to the high specific energy, high operating potential and long cycling life. However, it still encounters a great of complications to realize the improvement of poor cycle stability and structural defects. In an effort to emphatically investigate the obvious advantages of eco-friendly and low-cost W doping cathode material on the crystalline morphology and electrochemical properties, LiNi0.65−xCo0.15Mn0.20WxO2 (x = 0.5%, 1.0%, 2.0%) were synthesized by hydroxide coprecipitation and calcination crystallization method. Especially, when the amount of W is 1.0% molar ratio, the initial discharge capacity reaches 216.55 mAh g−1 and achieves a capacity retention of 95.95% after 100 cycles with the operation voltage of 2.7–4.4 V at 1C. The reliable results show that the primary particle size via doping appropriate content of W become significantly smaller which can effectively consolidate the stability of the crystal cathode material and improve the recycling performance evidently. In addition, the element of W was detected in the lattice of the crystal particle, which bring about somewhat increase of lattice spacing and expands the Li+ diffusion channels during charge/discharge cycles. This work provides a potential application prospect by the strategy of W modification in the cathode materials of micron-sized particles for efficient lithium-ion batteries.
研究领域:
材料科学
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电化学
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能源存储技术
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Yutao Xu,Fatima Zahra Chafi,Peng Chen,Cancan Peng,Ya-Jun Cheng,Kunkun Guo,Xiuxia Zuo,Yonggao Xia
Nickel-rich layered cathodes (for example, NCM811) hold great promise for practical applications in high-energy density lithium-ion battery technology. However, a nickel-rich cathode has poor cyclic stability because of the structure degradation induced by repeated cycles and excessive formation of thick cathode–electrolyte interface (CEI) layers. Poly(vinylidene difluoride) (PVDF) is a typical binder used to form a positive electrode, which nevertheless lacks the functionality to suppress structure degradation and control CEI layer formation. A new concept is proposed in this work to use a multi-functional block copolymer of poly(ether imide)-block-poly(dimethyl siloxane) (PEI-b-PDMS; abbreviated as PEMS) as the binder for the nickel-rich cathode. Unlike the conventional PVDF binder, the PEMS binder is capable of inhibiting crack formation within the NCM811 particles to retard structure degradation over cycles because of its elastomeric feature. The PEMS binder also enables tuning the composition of the CEI layer and inhibits the formation of overly thick CEI layers because the carbonate solvent molecules are excluded from the solvation sheath by the PEMS binder. Enhanced electrolyte affinity is exhibited by the electrode with the PEMS binder as evidenced by the contact angle measurement. Improved carbon black dispersion within the electrode is achieved by the PEMS binder because the PEI aromatic chain has strong affinity toward the carbon black particles. Both the cycling and rate performance of the NCM811 cathode is improved with the PEMS binder compared to the PVDF binder. In detail, the capacity retention is increased from 63.9 to 80.6% after 200 cycles at 0.5 C (1 C = 205 mAh g–1) when the PVDF binder is replaced by the PEMS binder. The rate performance at current densities of 2 and 5 C is increased significantly due to enhanced electrochemical kinetics.
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 Sustainable Chemistry & Engineering
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2025
·
IF 7.3
Ling Xin,Meng Ning,Ruimei Xu,Zhijian Huang,Yukai Hua,Xiao Yu,Yong Liu
The closed-loop recovery of valuable metals from spent lithium-ion battery (LIB) cathodes and their regeneration into high-performance cathodes are crucial for resource efficiency. However, conventional closed-loop processes use acids for leaching and strong alkalis for coprecipitation, which prevents true integration. Here, a cascading closed-loop strategy is proposed to leach metal ions from the spent LiNi0.5Co0.2Mn0.3O2 (NCM523) ternary material using organic acid and then produce NCM523 ternary material in the acidic leachate through a cation chelation and reassembly process. The entire process is carried out in an open vessel under ambient conditions within 40 min. The closed-loop process-derived NCM523 (CLP-NCM523) has the target stoichiometry and a one-dimensional quasi-single crystal structure, which enhances Li+ diffusion kinetics. The leaching efficiencies for Ni, Co, and Mn are 98.37%, 98.39%, and 99.43%, respectively, and the recovery efficiencies are 83.71%, 86.29%, and 81.61%, respectively. CLP-NCM523 cathodes exhibit superior electrochemical performance, particularly at high rates: 101.4 mA h g–1 at 10C (vs 69.5 mA h g–1 for commercial NCM523) and 86.7% capacity retention after 200 cycles. This strategy reduces the costs of converting acidic leachate to alkaline solution and avoids uneven element distribution in the precursor that occurs in coprecipitation-based closed-loop processes, demonstrating high potential for sustainable LIB recycling.
研究领域:
材料科学
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环境工程
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
ShuangYuan Tan,Lei Wang,Liang Bian,JinBao Xu,Wei Ren,PengFei Hu,AiMin Chang
Although lithium ion battery is known to be an excellent renewable energy provider in electronic markets further application of it has been limited by its notoriously poor performance at low temperature, especially below −20 °C. In this paper, the electrochemical performance of the LiNi 1/3 Co 1/3 Mn 1/3 O 2 cathode materials coated by lithium boron oxide (LBO) glass was investigated at a temperature range from 20 to −40 °C. The results show that the LBO coating not only helps to improve the discharge capacity of LiNi 1/3 Co 1/3 Mn 1/3 O 2 at room temperature but also increase the discharge capacity retention of the LiNi 1/3 Co 1/3 Mn 1/3 O 2 from 22.5% to 57.8% at −40 °C. Electrochemical impedance spectra results reveal that the LBO coating plays an important role in reducing the charge-transfer resistance on the electrolyte–electrode interfaces and improving lithium ion diffusion coefficients . The mechanism associated with the change of the structure and electrical properties are discussed in detail.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Duan Yunlong,Guo Liying,Zhang Xiao,Zhao Xudong,Zhang Linnan
With the increasing energy problems and environmental pollution, lithium-ion batteries have gradually become the preferred power source for new energy vehicles due to their high energy density. With the global popularity of lithium-ion batteries, the heavy metal pollution and resource waste caused by spent batteries are becoming more and more obvious, and as a result, research on recycling treatment and resource utilization technology is critical. In this study, the leaching treatment of waste ternary cathode materials was carried out by using a H 2 SO 4 -H 2 O 2 leaching system, and the recycled metal elements were used as raw materials for subsequent synthesis. The NCM622 precursor (Ni 0.6 Co 0.2 Mn 0.2 (OH) 2 ) and Li 2 CO 3 were prepared by the co-precipitation method, and the high-performance NCM622-type (LiNi 0.6 Co 0.2 Mn 0.2 O 2 ) cathode materials were regenerated by argon-oxygen mixed gas calcination at 850°C after pre-oxidation treatment. The materials exhibited excellent electrochemical performance, with capacity retention as high as 91% after 100 cycles at 0.2C current density, thus demonstrating the ability of this process to achieve high-performance regeneration of NCM622-type cathode materials.
研究领域:
材料科学
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能源技术
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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）