Highly robust and flexible micro-supercapacitors based on medium-entropy carbide nanowires toward sub-ambient temperature operation
Highly robust and flexible micro-supercapacitors based on medium-entropy carbide nanowires toward sub-ambient temperature operation
复制标题
DOI：
10.1016/j.jpowsour.2023.232986
复制
发表时间：
2023-06
影响因子：
9.2
通讯作者：
Xiangjun Li;Bingchao Yang;Xiaoran Zhang;Shuai Duan;Xingang Jiang;Mengdong Ma;Wen-cai Yi;Hairui Sun;Zhixiu Wang;Yanhui Chu;Xiaobing Liu
中科院分区：
文献类型：
--
作者：
Xiangjun Li;Bingchao Yang;Xiaoran Zhang;Shuai Duan;Xingang Jiang;Mengdong Ma;Wen-cai Yi;Hairui Sun;Zhixiu Wang;Yanhui Chu;Xiaobing Liu
目前，探索具有令人满意的性能的用于恶劣环境应用的能量转换/存储装置仍然是一个巨大的挑战。本文报道了以（Ta，Ti，Nb）C纳米线（NWs）和活性炭混合结构为电极材料的高稳定性和柔性的微型超级电容器（MSC）。由于（Ta，Ti，Nb）C纳米线的固有优点，如稳定的导电性和机械柔性，以及由交联的（Ta，Ti，Nb）C纳米线和竹基活性炭形成的丰富的多孔结构，所制备的（Ta，Ti，Nb）C/C-MSCs显示出高的电化学性能、机械稳定性和在宽温度范围内的温度耐受性。值得注意的是，与室温下相比，所构建的（Ta，Ti，Nb）C/C-MSC可以耐受低至-50 °C的亚环境温度操作，电容保持率为82.7%，并且在-50 ° C和25 °C之间的一个冷却和加热循环中，电容保持率高达97.7%。即使在25至-50 °C的温度范围内的渐进变化下，电容保持率在9000次循环中保持高达92.6%，这表明它们有希望作为高度稳健的MSC用于恶劣的低温条件下的能量存储。
Currently, the exploration of energy conversion/storage devices for harsh environment applications with satisfying property is still a grand challenge. In the present work, the highly robust and flexible micro-supercapacitors (MSCs) based on (Ta, Ti, Nb)C nanowires (NWs) and activated carbon hybrid structures as the electrode materials are reported. Given to the inherent advantages of (Ta, Ti, Nb)C NWs, e.g. stable electrical conductivity and mechanical flexibility, and abundant porous structure stemed from cross-linked (Ta, Ti, Nb)C NWs and bamboo-based active carbon, the as-prepared (Ta, Ti, Nb)C/C-MSCs show high electrochemical performance, mechanical stability, and temperature tolerance over a wide temperature range. Remarkably, the as-constructed (Ta, Ti, Nb)C/C-MSCs can endure the sub-ambient temperature operation down to −50 °C with a capacitance retention of 82.7% and present capacitance retention up to 97.7% over one cycle of cooling and heating between −50 and 25 °C, compared with that at room temperature. Even under progressive variation in temperatures ranged between 25 and -50 °C, the capacitance retention keeps up to 92.6% over 9000 cycles, representing their promising to be serviced as highly robust MSCs against harsh low-temperature conditions for energy storage.