Enhanced Electrochemical Capacity of Spherical Co-Free Li_1.2 Mn_0.6 Ni_0.2 O₂ Particles after a Water and Acid Treatment and its Influence on the Initial Gas Evolution Behavior.

ABSTRACT: Li-rich layered oxides (LRLO) with specific energies beyond 900 Wh kg^-1 are one promising class of high-energy cathode materials. Their high Mn-content allows reducing both costs and the environmental footprint. In this work, Co-free Li_1.2 Mn_0.6 Ni_0.2 O₂ was investigated. A simple water and acid treatment step followed by a thermal treatment was applied to the LRLO to reduce surface impurities and to establish an artificial cathode electrolyte interface. Samples treated at 300 °C show an improved cycling behavior with specific first cycle capacities of up to 272 mAh g^-1 , whereas powders treated at 900 °C were electrochemically deactivated due to major structural changes of the active compounds. Surface sensitive analytical

SUBMITTER: Klein F 

PROVIDER: S-EPMC9826533 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature