| 초록 |
Exploring the exceptional reaction mechanism and related electrode materials can be critical for pushing current battery technology to a next level. Here, we introduce an excellent reaction with Co(OH)2 material, which exhibits about twice the capacity of the theoretical capacity based on the conversion reaction, and retains its first cycle capacity after 30 cycles. The combined results from ex situ XRD, XAS, AIMD simulation, STEM, and XPS measurements indicate that nanosized Co metal particles and LiOH are generated by conversion reaction at high voltages, and CoxHy, Li2O, and LiH are subsequently formed by hydride reaction between Co metal, LiOH, and other lithium species at low voltages, resulting in a anomalously high capacity beyond the theoretical capacity of Co(OH)2. Subsequently, we will also present detailed lithium storage mechanisms for nanostructured anode materials that show anomalously higher capacity than their theoretical limit, at the time of meeting. |
