Superior wide-temperature lithium storage in a porous cobalt vanadate

• 作 者: Haoliang Chen Dan Yang Xueye Zhuang Dong Chen Weiling Liu Qi Zhang Huey Hoon Hng Xianhong Rui Qingyu Yan Shaoming Huang
• 机 构: Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Collaborative Inno
• 出 处: 纳米研究（英文版）
• 发表日期: 2020年7期
• 关键词: lithium-ion battery anode material cobalt vanadate porous structure wide-tempera

Lithium ion batteries (LIBs) that can be operated under extended temperature range hold significant application potentials.Here in this work,we successfully synthesized Co2V2O7 electrode with rich porosity from a facile hydrothermal and combustion process.When applied as anode for LIBs,the electrode displayed excellent stability and rate performance in a wide range of temperatures.Remarkably,a stable capacity of 206 mAh·g-1 was retained after cycling at a high current density of 10 A·g-1 for 6,000 cycles at room temperature (25 ℃).And even when tested under extreme conditions,i.e.,-20 and 60 ℃,the battery still maintained its remarkable stability and rate capability.For example,at-20 ℃,a capacity of 633 mAh·g-1 was retained after 50 cycles at 0.1 A·g-1;and even after cycling at 60 ℃ at 10 A·g-1 for 1,000 cycles,a reversible capacity of 885 mAh·g-1 can be achieved.We believe the development of such electrode material will facilitate progress of the next-generation LIBs with wide operating windows.