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在NASICON聚合物复合材料电解质基固态超级电容器中通过界面修改实现高性能参数

Neha¹, Anshuman Dalvi¹

¹Department of Physics, BITS Pilani Pilani Campus RJ-333031 India adalvi@pilani.bits-pilani.ac.in.

|February 28, 2025

概括

一种新的溶剂层策略显著提高了固态超级电容器的性能. 这种方法通过优化活性炭和固体聚合物电解质的电极-电解质接口来增强能量储存和稳定性.

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:

固态超级电容器提供更安全的储能替代方案.
优化电极-电解质接口对于提高超级电容器性能至关重要.
活性炭和固体聚合物电解质是超级电容器设计的关键组成部分.

研究的目的:

为提高固态超级电容器性能制定战略.
使用一种新的溶剂层方法优化电极-电解质接口.
调查溶剂结合对器件特性和稳定性的影响.

主要方法:

使用具有高表面积 (1800 m2 g−1) 的活性碳电极.
使用Na3Zr2Si2PO12 (NZSP) 分散的快速离子固体聚合物电解质.
在电极 - 电解质接口上引入少量乙尼烯有机溶剂.
执行了静电充放电周期,以评估性能和稳定性.

主要成果:

在3 V/5 mA时,达到260 F g-1的特定电容和4780 W kg-1的高特定功率.
经过1万个循环后,证明了~99%的库伦比效率和~90%的电容保留.
展示了五个堆叠的电池能够为8伏LED电路供电超过30分钟的能力.
观察到活性炭表面积的利用率提高,电荷转移速度更快.

结论:

溶剂层方法有效地提高了固态超级电容器的性能.
溶剂的结合会产生局部的"凝状"层,改善电极-电解质合和电荷运动.
该战略为开发高性能,稳定的固态储能器件提供了一个有前途的途径.

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