2D Graphene/MnO Heterostructure with Strongly Stable Interface Enabling High-Performance Flexible Solid-state Lithium-Ion Capacitors

被引:92
|
作者
Liu, Wenjie [1 ,2 ]
Zhang, Xiong [1 ,2 ,3 ]
Xu, Yanan [1 ]
Wang, Lei [1 ,2 ]
Li, Zhao [4 ]
Li, Chen [1 ]
Wang, Kai [1 ,2 ,3 ]
Sun, Xianzhong [1 ]
An, Yabin [1 ]
Wu, Zhong-Shuai [3 ,5 ]
Ma, Yanwei [1 ,2 ,6 ]
机构
[1] Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China
[4] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, State Key Lab Met Matrix Composite, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
[5] Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
[6] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China
基金
北京市自然科学基金; 中国国家自然科学基金;
关键词
electrostatic self-assemblies; flexible; heterostructures; MnO nano-cabbages; lithium-ion capacitors; MNO NANOPARTICLES; CARBON NANOSHEETS; ANODE MATERIALS; STORAGE; SHELL; COMPOSITES; BATTERIES; FRAMEWORK; EFFICIENT; CATHODE;
D O I
10.1002/adfm.202202342
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The delicate structural engineering is widely acknowledged as a powerful tool for boosting the electrochemical performance of conversion-type anode materials for lithium storage. Here, a general electrostatic self-assembly strategy is proposed for the in situ synthesis of MnO nano-cabbages on negatively charged reduced graphene oxide (rGO/MnO). The strong interfacial heterostructure and robust lithium storage mechanism related to fast Li+ diffusion kinetics and high Li-adsorption ability of rGO/MnO heterostructure are confirmed through operando experimental characterizations and theoretical calculation. Owing to the rapid charge transfer, enriched reaction sites, and stable heterostructure, the as-synthesized rGO/MnO anode delivers a high capacity (860 mAh g(-1) at 0.1 A g(-1)), superior rate capability (211 mAh g(-1) at 10 A g(-1)), and cycle stability. Notably, the as-assembled flexible pouch cell of activated carbon//rGO/MnO solid-state lithium-ion capacitors (LICs) possesses an exceptional energy density of 194 Wh kg(-1) and power density of 40.7 kW kg(-1), both of which are among the highest flexible solid-state LICs reported so far. Further, the LICs possess an ultralong life span with approximate to 77.8% retention after 10 000 cycles and extraordinary safety, demonstrative of great potential for practical applications.
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页数:11
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