用于能量存储的具有改善电化学性能的二维锶掺杂镍酸镧纳米片的合成

Synthesis of Two-Dimensional Sr-Doped LaNiO Nanosheets with Improved Electrochemical Performance for Energy Storage.

作者信息

Zhang Bin, Liu Ping, Li Zijiong, Song Xiaohui

机构信息

School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China.

School of Electric and Information Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China.

出版信息

Nanomaterials (Basel). 2021 Jan 9;11(1):155. doi: 10.3390/nano11010155.

Designing a novel, efficient, and cost-effective nanostructure with the advantage of robust morphology and outstanding conductivity is highly promising for the electrode materials of high-performance electrochemical storage device. In this paper, a series of honeycombed perovskite-type Sr-doped LaNiO nanosheets with abundant porous structure were successfully synthesized by accurately controlling the Sr-doped content. The study showed that the optimal LSNO-0.4 (LaSrNiO) electrode exhibited excellent electrochemical performance, which showed a high capacity of 115.88 mAh g at 0.6 A g. Furthermore, a hybrid supercapacitor device (LSNO//AC) based on LSNO-0.4 composites and activated carbon (AC) showed a high energy density of 17.94 W h kg, a high power density of 1600 W kg, and an outstanding long-term stability with 104.4% capacity retention after 16,000 cycles, showing an excellent electrochemical performance and a promising application as an electrode for energy storage.

设计一种具有坚固形态和出色导电性优势的新型、高效且经济高效的纳米结构，对于高性能电化学储能装置的电极材料而言极具前景。本文通过精确控制锶掺杂含量，成功合成了一系列具有丰富多孔结构的蜂窝状钙钛矿型锶掺杂镧镍氧化物纳米片。研究表明，最优的LSNO-0.4（LaSrNiO）电极展现出优异的电化学性能，在0.6 A g的电流密度下具有115.88 mAh g的高比容量。此外，基于LSNO-0.4复合材料和活性炭（AC）的混合超级电容器装置（LSNO//AC）表现出17.94 W h kg的高能量密度、1600 W kg的高功率密度以及出色的长期稳定性，在16000次循环后容量保持率为104.4%，显示出优异的电化学性能以及作为储能电极的广阔应用前景。