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| 锂硫电池S@pPAN正极用柔性黏结剂研究 | |
| 引用本文： | 李婷婷,张阳,陈加航,闵宇霖,王久林. 锂硫电池S@pPAN正极用柔性黏结剂研究[J]. 无机材料学报, 2022, 37(2): 182-188. DOI: 10.15541/jim20210303 |
| 作者姓名： | 李婷婷 张阳 陈加航 闵宇霖 王久林 |
| 作者单位： | 1.上海电力大学 环境与化学工程学院, 上海200090; 2.上海交通大学 化学化工学院, 上海200240; 3.郑州大学 化学系, 郑州 450001 |
| 基金项目： | 国家自然科学基金(U1705255)； |
| 摘 要： | 硫化聚丙烯腈(S@pPAN)作为锂硫电池正极材料实现了固–固转化反应机制,没有多硫离子溶解现象,但电化学循环过程中出现明显的体积变化,其表界面特性对电化学性能具有重要影响.本研究以单壁碳纳米管(SWCNT)与羧甲基纤维素钠(CMC)复配作为S@pPAN正极黏结剂,调控S@pPAN表界面并缓解充放电过程中的体积变化.在2... |
| 关 键 词： | 锂硫电池 S@pPAN正极 羧甲基纤维素钠 黏结剂 界面稳定 |
| 收稿时间： | 2021-05-12 |
| 修稿时间： | 2021-08-17 |
Flexible Binder for S@pPAN Cathode of Lithium Sulfur Battery |
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| LI Tingting,ZHANG Yang,CHEN Jiahang,MIN Yulin,WANG Jiulin. Flexible Binder for S@pPAN Cathode of Lithium Sulfur Battery[J]. Journal of Inorganic Materials, 2022, 37(2): 182-188. DOI: 10.15541/jim20210303 | |
| Authors: | LI Tingting ZHANG Yang CHEN Jiahang MIN Yulin WANG Jiulin |
| Affiliation: | 1. College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China; 2. College of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; 3. Department of Chemistry, Zhengzhou University, Zhengzhou 450001, China |
| Abstract: | Sulfurized pyrolyzed poly(acrylonitrile) (S@pPAN) composite as cathode material of Li-S battery realizes a solid-solid conversion reaction mechanism without dissolution of polysulfides. However, its surface and interface characteristics influence the electrochemical performance significantly, and there are also obvious volume changes during electrochemical cycling. In this study, single-walled carbon nanotubes (SWCNT) and sodium carboxymethyl cellulose (CMC) were used as binder for S@pPAN cathode to regulate the surface of S@pPAN and alleviate volume changes during charging and discharging. At a current density of 2C, capacity retention rate of the batteries after 140 cycles was 84.7%, and a high specific capacity of 1147 mAh∙g-1 can still be maintained at a high current density of 7C. The ultimate tensile strength for the film of the composite binder increases by 41 times after adding SWCNT, and the composite binder guarantees a more stable electrode interface during operation, thereby effectively improves the cycle stability of the as sembled lithium-sulfur batteries. |
| Keywords: | lithium-sulfur battery S@pPAN cathode sodium carboxymethyl cellulose binder stable interface |
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