Tracking the Influence of Thermal Expansion and Oxygen Vacancies on the Thermal Stability of Ni-Rich Layered Cathode Materials.

ABSTRACT: The ever-growing demand for high-energy lithium-ion batteries in portable electronics and electric vehicles has triggered intensive research efforts over the past decade. An efficient strategy to boost the energy and power density of lithium-ion batteries is to increase the Ni content in the cathode materials. However, a higher Ni content in the cathode materials gives rise to safety issues. Herein, thermal expansion and oxygen vacancies are proposed as new critical factors that affect the thermal stability of charged Ni-rich cathode materials based on a systematic synchrotron-based X-ray study of Li_0.33Ni_{0.5+ x} Co_0.2Mn_{0.3- x} O₂ (x = 0, 0.1, 0.2) cathode materials during a heating process. Cha

SUBMITTER: Lee E 

PROVIDER: S-EPMC7312338 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature