1. Dynamically Forming Interconnected Interfaces in Confined Heterostructures Enable High Capacity Conversion Chemistry.
- Author
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Jiang, Lu, Wang, Jinze, Yang, Youchao, Zhu, Junwen, Cao, Xin, Zhou, Yiming, Tang, Yawen, Wu, Ping, Jing, Yu, Li, Ruhong, and Fan, Xiulin
- Subjects
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HETEROSTRUCTURES , *ION channels , *ENERGY storage , *CHARGE exchange , *CHEMICAL kinetics , *ELECTRIC batteries - Abstract
Heterostructures endow electrochemical hybrids with promising energy storage properties owing to synergistic effects and interfacial interaction. However, developing a facile but effective approach to maximize interface effects is crucial but challenging. Herein, a bimetallic selenide heterostructure is realized in a confined carbon network via an in situ electrochemical strategy to induce highly active and stable electrode architecture. The dynamically formed heterostructures upon repeated delithiation/lithiation process not only yield abundant interconnected SnSe2/FeSe2 heterojunctions with continuous channels for ion/electron transfer but maintain excellent conversion reversibility. Serving as anode for lithium storage, the SnSe2/FeSe2@C framework enables a high discharging capacity of 1781.9 mAh g−1 at 0.5 A g−1 after 500 cycles and superior cycling stability (no capacity fade after 1200 cycles at 2 A g−1). This study can guide future design protocols for interface engineering through the formation of dynamic channels of conversion reaction kinetics for potential applications in high‐performance electrodes. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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