Non-stoichiometric CoS1.097 nanoparticles prepared from CoAl-layered double hydroxide and MOF templa

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As a main force in the energy evolution,lithium-ion batteries(LIBs)have been extensively studied in recent decades and are widely used in energy storage and portable electronic products as a result of their advantages of high working voltage and long cy-cle performance.However,LIBs face the challenges of the limited lithium supply,and safety issues[1,2].Hence,the development of new type of safe and high specific energy secondary battery system is necessary.Aluminum has approximately 4 times the volumetric charge-storage capacity of lithium as a result of its three-electron transfer redox reaction during the discharge/charge process.In addition,Al is considered to be the most abundant metal on earth and the price of Al is much lower than lithium[3-5].Therefore,aluminum-ion batteries(AIBs)based on alu-minum anode have great development potential,and it is expected to replace lithium batteries as the mainstream battery for large-scale energy storage systems.
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