An elastic carbon layer on echeveria-inspired SnO2 anode for long-cycle and high-rate lithium ion batteries
- An elastic carbon layer on echeveria-inspired SnO2 anode for long-cycle and high-rate lithium ion batteries
- 김아영; 김정섭; 차이룰 후다야; Dongdong Xiao; Dongjin Byun; Lin Gu; Xiao Wei; Yuan Yao; Richeng Yu; 이중기
- elastic carbon layer; echeveria-inspired SnO2 anode; lithium ion batteries
- Issue Date
- VOL 94, 539-547
- The commercialization of Sn-based anodes for lithium ion batteries is still hindered due to the inherent volume change leading to a rapid capacity fading during the electrochemical cycle. Inspired by echeveria, a plant that stores sufficient water in its hierarchical leaves to survive in a drought, we report a breakthrough by designing the hierarchical and nanoporous SnO2 electrode encapsulated with ultrathin carbon layer ( 2 nm). As evidently captured by in situ transmission electron microscopy, the conformal carbon coating on the surface of anode may provide an elastic cover that suppresses the cracks due to severe volume change, and increases both electrical and ionic conductivity, allowing the cells to exhibit excellent lithium storage performance with more than 800 cycles even with relatively high-rate of current densities.
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