High‐Voltage LiNi0.45Cr0.1Mn1.45O4 Cathode with Superlong Cycle Performance for Wide Temperature Lithium‐Ion Batteries. (27th November 2017)

• Record Type: Journal Article
• Authors: Wang, Jiang; Nie, Ping; Xu, Guiyin; Jiang, Jiangmin; Wu, Yuting; Fu, Ruirui; Dou, Hui; Zhang, Xiaogang
• Is Part Of: Advanced functional materials. Volume 28:Number 4(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-11-27
• Subjects: Cr doping -- cycling performance -- high voltage -- LiNi0.45Cr0.1Mn1.45O4 -- low temperature; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201704808
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Spinel LiNi0.45 Cr0.1 Mn1.45 O4 synthesized by a scalable solution route combined by high temperature calcination is investigated as cathode for ultralong‐life lithium‐ion batteries in a wide operating temperature range. Scanning electron microscopy reveals homogeneous microsized polyhedral morphology with highly exposed {100} and {111} surfaces. The most highlighted result is that LiNi0.45 Cr0.1 Mn1.45 O4 has extremely long cycle performance and high capacity retention at various temperatures (0, 25, 50 °C), indicating that Cr doping is a prospective approach to enable 5 V LiNi0.5 Mn1.5 O4 (LNMO)‐based cathode materials with excellent cycling performances for commercial applications. After 1000 cycles, the capacity retention of LiNi0.45 Cr0.1 Mn1.45 O4 is 100.30% and 82.75% at 0 °C and 25 °C at 1 C rate, respectively. Notably, over 350 cycles at 50 °C, the capacity retention of LiNi0.45 Cr0.1 Mn1.45 O4 can maintain up to 91.49% at 1 C. All the values are comparable to pristine LNMO, which can be attributed to the elimination of Li y Ni1− y O impurity phase, highly exposed {100} surfaces, less Mn 3+ ions, and enhancement of ion and electron conductivity by Cr doping. Furthermore, an assembled LiNi0.45 Cr0.1 Mn1.45 O4 /Li4 Ti5 O12 full cell delivers an initial discharge capacity of 101 mA h g −1, meanwhile the capacity retention is 82.07% after 100 cycles. Abstract : The polyhedral LiNi0.45 Cr0.1 Mn1.45 O4 with {100} surfaces synthesized by a scalable solution route is a promising 5 V LiNi0.5 Mn1.5 O4 ‐based cathode material. The prepared LiNi0.45 Cr0.1 Mn1.45 O4 has an extremely long cycling performance and high capacity retention at various temperatures (0, 25, 50 °C) and excellent full cell performance with Li4 Ti5 O12 anode.