Porous carbon matrix-encapsulated MnO in situ derived from metal-organic frameworks as advanced anode materials for Li-ion capacitors
نویسندگان
چکیده
Conversion-type anode materials hold great potential for Li+ storage applications owing to their high specific capacity, while large volume expansion and poor electrical conductivity limit rate cycling performances. Herein, a bimetal ZnMn-based metal-organic framework (ZnMn-MOF) is engineered in situ conversion of MnO-encapsulated porous carbon (MnO/PC) composite. The templating activation effects coordinated Zn endow the converted PC matrix with highly structure. This enhances compatibility MnO particles, resulting full encapsulation particles matrix. More significantly, provides enough void space buffer change, which fully wraps without crack or fracture during repeated cycling. As result, MnO/PC shows charge capability, extraordinary performance, long-term stability at same time. Thus exhibits delithiation capacities 768 mA h g?1 0.1 A 487 0.7 g?1, combined an unattenuated performance after 500 cycles 0.3 g?1. demonstrates well-matched capacitive activated electrode Li-ion capacitor (LIC) cell. LIC energy 153.6 W kg?1 210 kg?1, 71.8 power 63.0 kW kg?1.
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ژورنال
عنوان ژورنال: Science China. Materials
سال: 2021
ISSN: ['2095-8226', '2199-4501']
DOI: https://doi.org/10.1007/s40843-021-1727-3