在高性能离子电池中激活MXene/PANI的伪容量行为
Yeying Li1,2, Leixi Du1,2, Liping Zhang1
1Flexible Electronics Innovation Institute (FEII), Jiangxi Provincial Key Laboratory of Flexible Electronics, Jiangxi Science and Technology Normal University, Nanchang, 330013, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|August 22, 2025
概括
研究人员开发了一种用于水性离子电池 (AAIB) 的新型MXene/聚烯复合物. 质子辅助的离子协同干扰显著提高了NH4+储存能力和循环稳定性,使高性能能量储存成为可能.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 水性离子电池 (AAIB) 需要具有高NH4+储能和高效离子传输的电极材料.
- 基于MXene的材料对AAIB具有前景,但优化其电化学性能仍然是一个挑战.
研究的目的:
- 通过制造金属空MXene/polyaniline (Mo4/3CTz/PANI) 复合物来开发AAIB的高性能电极材料.
- 在AAIB中研究质子兴奋剂对复合物的电化学性能的协同作用.
主要方法:
- 一个Mo4/3CTz/PANI复合电极的制造.
- 在1m (NH4) 2SO4电解质中进行电化学测试,含有或不含有0.1m H2SO4.
- 实验性表征和密度功能理论 (DFT) 计算以了解离子运输和氧化还原机制.
主要成果:
- 通过H2SO4引入的质子兴奋剂使得NH4+/H3O+的快速和可逆的协同插入,显著改善了NH4+的储存.
- 在0.1Ag-1下,Mo4/3CTz/PANI复合物获得了245mAhg-1的高特异容量和优异的容量保留率 (84.2%在1.0Ag-1下11000次循环后).
- 一个充满电池的能量密度高达81.6Wh/kg,功率密度高达16000W/kg.
结论:
- 基于MXene的电极中的质子增强离子存储机制为推进AAIB提供了有希望的策略.
- 这种Mo4/3CTz/PANI复合材料具有卓越的电化学性能,突出了其在实际储能应用中的潜力.
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