Issue 28, 2020

Synthesis of hierarchically porous MnO/C composites via a sol–gel process followed by two-step combustion for lithium-ion batteries

Abstract

Hierarchically porous MnO/C composites with interconnected macropores and co-continuous skeletons were fabricated via a sol–gel process combined with phase separation, followed by a two-step combustion. The MnO nanoparticles were assembled into the carbonaceous skeletons to construct hierarchically porous MnO/C composites. The resultant MnO/C composites used as the active material in a lithium-ion battery display outstanding specific capacities of 1107 mA h g−1 after 300 cycles at 200 mA g−1 and great rate capabilities of 610 mA h g−1 at 2 A g−1. Besides, the specific capacity could retain a value of 480 mA h g−1 at 1 A g−1 after 1000 cycles. The superior electrochemical Li-storage property with a high specific capacity, great cycling durability and excellent rate performance was rationally associated with the intrinsic structural advantages and component effects due to the hierarchical porous structures. The MnO/C composites fabricated via a facile sol–gel synthesis followed by a two-step combustion demonstrate their potential of being applied to well-performing Li-ion batteries.

Graphical abstract: Synthesis of hierarchically porous MnO/C composites via a sol–gel process followed by two-step combustion for lithium-ion batteries

Article information

Article type
Paper
Submitted
29 Mar 2020
Accepted
24 Jun 2020
First published
24 Jun 2020

New J. Chem., 2020,44, 12307-12316

Synthesis of hierarchically porous MnO/C composites via a sol–gel process followed by two-step combustion for lithium-ion batteries

W. Liu, D. Feng, H. Yang and X. Guo, New J. Chem., 2020, 44, 12307 DOI: 10.1039/D0NJ01538E

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