可充电的离子全电池在-40°C下工作
Jiangchun Chen1, Dong An1, Sicong Wang1
1School of Chemistry, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing, 100191, China.
Angewandte Chemie (International ed. in English)
|June 28, 2023
概括
研究人员开发了第一个可充电的离子全电池,使用硬碳阳极用于冷储能. 这一创新使低温电池的高效性能成为可能,克服了以前的局限性.
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:
- 离子电池 (PIBs) 显示出对冷储能储能的承诺.
- 目前的低温PIB仅限于带有金属阳极的半电池.
- 开发可充电的全电池面临着阳极材料和电解质的挑战.
研究的目的:
- 制造出第一个基于硬碳 (HC) 的低温离子全电池.
- 为了研究低温下HC阳极中的储存机制.
- 为了评估基于HC的全细胞在-40°C的电化学性能.
主要方法:
- 制造一种新的基于HC的离子全细胞.
- 在HC阳极中对储存行为的实验分析.
- 化机制的理论分析 (缺陷吸附,协同插曲,纳米孔填充).
- 在-40°C的电化学测试,包括循环性能和能量密度测量.
主要成果:
- 成功制造出第一个基于HC的低温离子全电池.
- 在低温下的HC阳极中确定了独特的化过程.
- 在-40°C下以175mAhg-1的HC阳极容量 (室温容量的68%) 实现了出色的循环性能.
- 在-40°C下证明了令人印象深刻的可充电性和高能量密度 (>100Wh kg-1阴极).
结论:
- 开发的基于HC的全细胞代表了冷PIB的重大进步.
- 独特的储存机制有助于低界面电阻和高性能在-40°C.
- 这项工作克服了实现可充电低温PIB的关键挑战.
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