Activate metallic copper as high-capacity cathode for lithium-ion batteries via nanocomposite technology

作者：Huang, Ying; Zhang, Wang; Li, Sibai; Luo, Wei^*; Huang, Zhimei; Fang, Chun; Weng, Mouyi; Zheng, Jiaxin; Pan, Feng^*; Liu, Qingju^*; Huang, Yunhui

来源：Nano Energy, 2018, 54: 59-65.

DOI：10.1016/j.nanoen.2018.09.064

• Lithium-ion batteries
• Cathode
• Electrospinning
• Nanofiber
• Metallic Cu

In this work, metallic copper serving as a high-performance cathode in lithium-ion based carbonate electrolyte has been demonstrated. Computational modelling and in-situ ultraviolet-visible spectra confirm that Cu cathode experiences a two-electrons redox reaction: Cu <-> Cu2+ + 2e. during charge/discharge process. By using onedimensional (1D) nano-structure design and surface modification strategy, the Cu cathode delivers a reversible capacity of 635 mAh/gCu with a high output voltage of 3.61 V and affords a superior rate capability. With Li4Ti5O12 as anode, a Cu/Li4Ti5O12 full cell exhibits a discharge capacity of 601 mAh/g(Cu) and an energy density of 1202 Wh/kg(Cu). The strategy of using metallic Cu as cathode in lithium-ion batteries is quite simple and broadly applicable, which may provide new opportunities for many other non-aqueous rechargeable batteries.

• 出版日期2018-12
• 单位同济大学; 北京大学深圳研究生院; 华中科技大学; 云南大学