A robust aqueous-processable polymer binder for long-life, high-performance lithium sulfur battery
A robust aqueous-processable polymer binder for long-life, high-performance lithium sulfur battery
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一种坚固的可水处理聚合物粘合剂，适用于长寿命、高性能锂硫电池
DOI：
10.1016/j.ensm.2018.12.009
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发表时间：
2019-09
影响因子：
20.4
通讯作者：
Deng Yonghong
中科院分区：
文献类型：
--
作者：
Yi Huan;Lan Tu;Yang Yu;Zeng Hongbo;Zhang Tian;Tang Tian;Wang Chaoyang;Deng Yonghong
锂硫电池（LSB）的发展受到多硫化锂（LiPS）在循环过程中的穿梭和活性材料的剧烈体积变化的严重影响。基于水性浆料的电极的生态友好制造对于实际应用是高度期望的。为了解决这些具有挑战性的问题，一种新型的可水处理的聚合物，壳聚糖硫酸盐乙基酰胺甘氨酰胺（CSEG），已被开发作为粘合剂的硫阴极。双酰胺结构赋予了CSEG上级的LiPS捕获能力，以阻止LiPS在电解液中的扩散和穿梭。CSEG基硫阴极在1 ℃下循环700次和6 ℃下循环450次，容量衰减率分别为0.049%和0.0895%。更重要的是，该阴极实现了优异的倍率性能，在40.26 mA cm-2（20 C）的放电电流密度下的容量为194.4 mAh g-1，其一次充电或放电过程仅需要21 s。如在这项工作中所证明的，新型CSEG粘合剂的电化学性能上级所有先前报道的用于硫阴极的可水处理的粘合剂。这一突破将极大地促进环保硫阴极的发展，为下一代LSB的实际应用铺平新的道路。
The development of lithium sulfur batteries (LSBs) has significantly suffered from the shuttle of lithium polysulfides (LiPS) and drastic volume change of the active materials during cycling processes. The eco-friendly manufacturing of electrodes based on aqueous slurries is highly desirable for practical applications. To address these challenging issues, a novel aqueous-processable polymer, chitosan sulfate ethylamide glycinamide (CSEG), has been developed as the binder for sulfur cathode. The dual-amide structures endow the CSEG with superior LiPS-trapping capability to impede the diffusion and shuttle of LiPS in electrolyte. The CSEG-based sulfur cathodes demonstrate remarkable cycling performances at 1 C for 700 cycles and 6 C for 450 cycles, with only 0.049%, 0.0895% capacity fading per cycle, respectively. More importantly, the cathode achieves excellent rate performance with a capacity of 194.4 mAh g-1at an ultrahigh current density of 40.26 mA cm-2(20 C), which takes only 21 s for one charge or discharge process. The electrochemical performance of the novel CSEG binder, as demonstrated in this work, is superior to all previously reported aqueous-processable binders for sulfur cathode. Such a breakthrough will greatly improve the development of eco-friendly sulfur cathode, paving new ways for the practical application of next-generation LSBs.
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影响因子：
27.8
作者：
Lv, Dongping;Zheng, Jianming;Xiao, Jie
通讯作者：
Xiao, Jie
影响因子：
17.6
作者：
Bhattacharya, Priyanka;Nandasiri, Manjula I.;Xiao, Jie
通讯作者：
Xiao, Jie
影响因子：
29.4
作者：
Chung, Sheng-Heng;Manthiram, Arumugam
通讯作者：
Manthiram, Arumugam
影响因子：
8.6
作者：
Y. Hwa;Peter D. Frischmann;B. Helms;E. Cairns
通讯作者：
Y. Hwa;Peter D. Frischmann;B. Helms;E. Cairns
影响因子：
20.4
作者：
D. Xiao;Chunxiang Lu;Chengmeng Chen;Shuxia Yuan
通讯作者：
D. Xiao;Chunxiang Lu;Chengmeng Chen;Shuxia Yuan