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Zn‐Ion Hybrid Micro‐Supercapacitors with Ultrahigh Areal Energy Density and Long‐Term Durability
Author(s) -
Zhang Panpan,
Li Yang,
Wang Gang,
Wang Faxing,
Yang Sheng,
Zhu Feng,
Zhuang Xiaodong,
Schmidt Oliver G.,
Feng Xinliang
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201806005
Subject(s) - materials science , power density , supercapacitor , anode , nanosheet , capacitance , cathode , energy storage , nanotechnology , current density , fabrication , ion , optoelectronics , electrode , power (physics) , electrical engineering , medicine , chemistry , physics , alternative medicine , engineering , quantum mechanics , pathology
On‐chip micro‐supercapacitors (MSCs), as promising power candidates for microdevices, typically exhibit high power density, large charge/discharge rates, and long cycling lifetimes. However, as for most reported MSCs, the unsatisfactory areal energy density (<10 µWh cm −2 ) still hinders their practical applications. Herein, a new‐type Zn‐ion hybrid MSC with ultrahigh areal energy density and long‐term durability is demonstrated. Benefiting from fast ion adsorption/desorption on the capacitor‐type activated‐carbon cathode and reversible Zn stripping/plating on the battery‐type electrodeposited Zn‐nanosheet anode, the fabricated Zn‐ion hybrid MSCs exhibit remarkable areal capacitance of 1297 mF cm −2 at 0.16 mA cm −2 (259.4 F g −1 at a current density of 0.05 A g −1 ), landmark areal energy density (115.4 µWh cm −2 at 0.16 mW cm −2 ), and a superb cycling stability without noticeable decay after 10 000 cycles. This work will inspire the fabrication and development of new high‐performance microenergy devices based on novel device design.