Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 21, Issue 33, Pages 12437-12443Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1jm10485c
Keywords
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Funding
- National Natural Science Foundation of China [20603022, 20973112]
- National 973 Program [2007CB209700]
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We firstly report the formation of 3D hierarchically porous MgCoSiO4 and the electrochemical intercalation of the bivalent cation Mg2+ in MgCoSiO4 with regard to its use as a cathode material in rechargeable magnesium batteries. Reversible Mg2+ intercalation can be demonstrated and the process is enhanced by the use of a novel 3D hierarchically porous architecture, consisting of a network of macropores with several nanometre wall and mesopores at the boundaries of grains or between grains. It is suggested that the interconnected wall structure, dual porosity and high surface area reduces the solid-state diffusion lengths for Mg diffusion, facilitates electrolyte penetration into particles and provides a large number of active sites for charge-transfer reactions.
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