Journal
JOURNAL OF POWER SOURCES
Volume 401, Issue -, Pages 6-12Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2018.08.079
Keywords
Cobalt selenide; Cathode material; Aluminum ion battery; Metal organic framework; Energy density
Funding
- National Natural Science Foundation of China [21476264]
- Taishan Scholar Foundation [tsqn20161017]
- Major Program of Shandong Province Natural Science Foundation, China [ZR201801280009]
- Fundamental Research Funds for the Central Universities [18 C x 05007]
- Graduate Innovation Fund of China University of Petroleum [YCX2017066]
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Aluminum ion batteries are attractive new generation energy storage devices in large-scale energy applications such as grid storage due to its low cost, high safety and three-electron-redox properties potentially leading to high capacity. Cathode materials with both high capacity and rate performance are urgently needed to fulfill such applications. Here, a three-dimensional carbon-encapsulated cobalt selenide nanoparticles are developed from metal organic frameworks as a novel aluminum ion batteries cathode. The cathode material delivers an unprecedented capacity of 427 mAh g(-1) at 1000 mA g(-1) with two high discharge plateaus at 1.0 V and 1.9 V (equivalent to energy density of 424 Wh kg(-1)). And even at a very high current density of 5000 mA g(-1), the initial discharge capacity of cathode electrode can reach 254.8 mAh g(-1), and a high capacity of 62.4 mAh g(-1) is retained after 100 cycles. Such outstanding performance are attributed to the well-defined nanostructure of three-dimensional carbon-encapsulated cobalt selenide cathode material. This work represents a significant step forward to prepare advanced cathode materials for aluminum ion batteries.
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