Abstract
Commercialization of aqueous batteries is mainly hampered by their low energy density, owing to the low mass loading of active cathode materials. In this work, a MnO2 cathode structure (MnO2 /CTF) is designed to modify the MnO2 /collector interface for enhanced ion transportation properties. Such a cathode can achieve ultrahigh mass loading of MnO2 , large areal capacity, and high energy density, with excellent cycling stability and rate performance. Specifically, a 0.15mm thick MnO2 /CTF cathode can realize a mass loading of 20mg cm-2 with almost 100% electrochemical conversion of MnO2 , providing the maximum areal capacity of 12.08mA h cm-2 and energy density of 191W h kg-1 for Zn-MnO2 /CTF batteries when considering both cathode and anode. Besides the conventional low energy demonstrations, such a Zn-MnO2 /CTF battery is capable of realistic applications, such as mobile phones inourdaily life, which is a promising alternative for wearable electronics.
Published Version
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