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稳定的高容量元素硫阴极与简单的过程,用于硫电池

Shunsuke Sawada¹, Hideki Yoshida¹, Shalom Luski²

¹R&D Division, Nichia Corporation, Anan 774-8601, Japan.

Molecules (Basel, Switzerland)

|June 28, 2023

概括

研究人员开发了一种新的硫电池阴极,使用复合电流收集器,结合剂和碳矩阵. 这种设计实现了高硫载荷和稳定的循环,以降低成本提高无人机能量密度.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
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,使其成为无人机的理想选择.
挑战包括低硫导电性和多硫化物穿,限制阴极性能.
现有的硫碳复合材料成本高,硫含量低,限制了面积容量.

研究的目的:

为Li-S电池开发具有高面积特定容量的稳定硫阴极.
以降低成本减轻聚硫化物穿和提高能源密度.
为了实现实用的Li-S电池设备的批量生产.

主要方法:

使用复合材料的电流采集器,特定的粘合剂和碳质矩阵用于硫浸.
通过确保组件之间良好的附着性来实现高硫载荷 (3.8 mg/cm2).
研究了粘合剂膨胀和电导性对骑自行车性能的影响.

主要成果:

成功达到3.8 mg/cm2的高硫负载,其特异性/面积容量为805 mAh/g/2.2 mAh/cm2.
证明了具有高硫负载的复合电极需要非膨胀的结合剂来实现稳定的循环.
电导性被发现是高硫载Li-S电池循环性能的主导因素.

结论:

复合电极设计包括碳质矩阵,高硫负载和非膨胀结合剂,对于高性能Li-S电池至关重要.
这种方法有效地解决了导电性和穿问题,从而提高了能量密度.
拟议的设计可用于大量生产实用的储能设备.

关键词:

面积容量面积容量碳纸是一种碳纸.阴极阴极是指一个阴极.基本硫元素的硫.硫电池是一种硫电池.胀胀胀在

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