Zhao Siliang, Lin Zhiping, Wu Fugen, Xiao Feng, Xu Jiantie
School of materials and energy, Guangdong University of Technology, Guangzhou 510006, China.
School of Physics and optoelectronic engineering, Guangdong University of Technology, Guangzhou 510006, China.
Nanomaterials (Basel). 2020 Jan 30;10(2):246. doi: 10.3390/nano10020246.
NaMnO (NMO) is treated by a wet chemical method in this paper. The treated NMO can form a copper oxide coating layer, and some of the coating layer can be peeled off, smoothing the surface of particles. Electrochemical measurement shows that treated NMO can maintain 72.6% of its specific capacity after 300 cycles, which is better than the 58.7% specific capacity of untreated NMO materials. Additionally, the ratio of capacity remaining rate can be improved from an initial 87% to 99.5%. So, this wet chemical method is available to smooth the electrode surface and reduce the internal impedance, and thus to effectively improve electrochemical performance during the battery cycle.
本文采用湿化学法对偏锰酸钠（NMO）进行处理。经处理的NMO可形成氧化铜涂层，部分涂层可剥落，使颗粒表面变得光滑。电化学测试表明，经处理的NMO在300次循环后可保持其比容量的72.6%，优于未处理的NMO材料的58.7%的比容量。此外，容量保持率可从初始的87%提高到99.5%。因此，这种湿化学方法可用于使电极表面光滑并降低内阻，从而在电池循环过程中有效提高电化学性能。
