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调整SPAN的膨胀和分散使高性能Li-S电池成为可能

Linshuo Li¹, Zhi Gao², Ruotong Zhao¹

¹Guangdong Provincial Key Laboratory of New Energy Materials Service Safety, Shenzhen Key Laboratory of Energy Electrocatalytic Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518071, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|October 22, 2025

概括

研究人员通过使用水作为溶剂和CMC&SBR粘合剂来优化硫 (Li-S) 电池阴极. 这种方法减少了胀,提高了结构稳定性,提高了周期寿命和商业化速度性能.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
储能储能储能储能储能储能

背景情况:

硫 (Li-S) 电池提供高能量密度和低材料成本.
目前的SPAN阴极需要提高能量密度,循环稳定性和速率性能,以实现商业可行性.
了解不同溶剂和各种结合剂中的SPAN阴极行为对于优化至关重要.

研究的目的:

首次研究SPAN在各种溶剂中的膨胀和分散.
通过评估不同的结合剂来优化电极结构.
为了提高Li-S电池的电化学性能和稳定性.

主要方法:

评估SPAN在不同溶剂中的膨胀和分散.
使用各种结合剂 (例如CMC&SBR) 来优化电极结构.
电化学测试,包括循环稳定性和速率性能分析.

主要成果:

作为溶剂的水有效地减少了SPAN膨胀和电极裂纹.
CMC&SBR粘合剂最大限度地减少了活性物质和导电性碳聚合物,提高了高速率容量.
经过优化后的电极在1°C的200个循环中保持了83%的容量,在5°C时保持了1192 mAhg-1的容量.
-S袋式电池实现稳定的循环 (>50个循环在0.2°C) 具有高负载 (7.2毫克/cm-2) 和面积容量 (>4 mAh/cm-2).

结论:

水溶剂和CMC&SBR粘合剂的组合显著提高了SPAN阴极稳定性和电化学性能.
优化的电极结构解决了Li-S电池商业化的主要局限性.
这项工作为开发实用和高性能Li-SPAN电池提出了一个有前途的战略.

关键词:

- 硫 (Li-S) 电池的使用情况在 SPAN 阴极上.分散的分散性分散.胀胀胀在

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