Bimetal–organic-framework derived CoTiO3/C hexagonal micro-prisms as high-performance anode materials for metal ion batteries
- 9 June 2021
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Materials Chemistry Frontiers
- Vol. 5 (15), 5760-5768
- https://doi.org/10.1039/d1qm00530h
Abstract
Titanium based oxides are promising electrode materials due to their appropriate operating voltage, small strain expansion, fast rate capability, safety, and low cost. Carbon materials exhibit a high cyclic stability but relatively low capacities. In order to combine the advantages of these two materials, a composite of well-defined 1D hexagonal micro-prisms cobalt titanate/amorphous carbon (CoTiO3/C) is synthesized by a simple sol–gel method and bimetal organic framework derived carbon doping. This composite provides more sodium ion storage sites and inhibits structural collapse during electrochemical cycles. Moreover, the bimetallic oxides form a self-supporting network to realize a wide voltage redox reaction, further alleviating the volume change. The as-prepared CoTiO3 micro-prisms exhibit high capacities of 214.3 and 483.8 mA h g−1 in sodium ion batteries and lithium ion batteries, respectively. More importantly, CoTiO3/C displays an outstanding cyclic stability, with a capacity retention ratio of 89.3% at 1 A g−1 for 1000 cycles in sodium ion batteries and 94.25% at 5 A g−1 for 1800 cycles in lithium ion batteries, respectively.Keywords
Funding Information
- National Natural Science Foundation of China (21471162)
- Hunan Provincial Science and Technology Department (2017TP1001)
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