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标题：Mesoporous hexagonal Co₃O₄ for high performance lithium ion batteries
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作者：Dawei Su ; Xiuqiang Xie ; Paul Munroe 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2014
卷号：4
DOI：10.1038/srep06519
出版社：Springer Nature
摘要：Mesoporous Co₃O₄ nanoplates were successfully prepared by the conversion of hexagonal β-Co(OH)₂ nanoplates. TEM, HRTEM and N₂ sorption analysis confirmed the facet crystal structure and inner mesoporous architecture. When applied as anode materials for lithium storage in lithium ion batteries, mesoporous Co₃O₄ nanocrystals delivered a high specific capacity. At 10 C current rate, as-prepared mesoporous Co₃O₄ nanoplates delivered a specific capacity of 1203 mAh/g at first cycle and after 200 cycles it can still maintain a satisfied value (330 mAh/g). From ex-situ TEM, SAED and FESEM observation, it was found that mesoporous Co₃O₄ nanoplates were reduced to Li₂O and Co during the discharge process and re-oxidised without losing the mesoporous structure during charge process. Even after 100 cycles, mesoporous Co₃O₄ crystals still preserved their pristine hexagonal shape and mesoporous nanostructure.