Self-supported TiN nanorod array/carbon textile as a lithium host that induces dendrite-free lithium plating with high rates and long cycle life. Issue 6 (23rd January 2020)

• Record Type: Journal Article
• Authors: Fang, Shan; Shen, Laifa; Li, Shaopeng; Dou, Hui; Zhang, Xiaogang
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 6(2020)
• Page Start: 3293
• Page End: 3299
• Publication Date: 2020-01-23
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9ta12337g
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A facile and effective approach, using self-supported TiN nanorods arrays/carbon textile prestored a certain amount of lithium as Li metal anode, which enabled excellent rate capability, cycling performance and very limited volume expansion. Abstract : Fabrication of a stable dendrite-free Li metal anode that accommodates very large volume changes is urgently needed for the development of advanced lithium metal batteries. Herein, an integrated Li/TiN/carbon textile anode (LTNC) is fabricated in which lithium is hosted in a self-supported TiN nanorod array with high surface area, excellent electrical conductivity, and porous structure. The as-prepared LTNC anode achieves outstanding electrochemical performance with a low overpotential of 50 mV and stable cycling for 1000 h at 1 mA cm −2, 1 mA h cm −2, and even at a high current density of 10 mA cm −2 it shows highly stable performance with a low overpotential. When paired with a LiNi0.8 Mn0.1 Co0.1 O2 cathode, the assembled cells display enhanced capacity retention of 85% after 500 cycles at 1C and improved coulombic efficiency. Furthermore, a high capacity of 2.3 mA h cm −2 with a capacity retention of 92% is maintained at 1 mA cm −2 after 100 cycles when the negative to positive electrode capacity ratio is only ∼3.5. This work indicates that the structural engineering of Li metal is highly applicable for lithium metal batteries with high rates and long cycle life.