摘要
Lithium-sulfur(Li-S)batteries as power supply systems possessing a theoretical energy density of as high as 2600 Wh kg−1 are considered promising alternatives toward the currently used lithium-ion batteries(LIBs).However,the insulation characteristic and huge volume change of sulfur,the generation of dissolvable lithium polysulfides(LiPSs)during charge/discharge,and the uncontrollable dendrite formation of Li metal anodes render Li-S batteries serious cycling issues with rapid capacity decay.To address these challenges,extensive efforts are devoted to designing cathode/anode hosts and/or modifying separators by incorporating functional materials with the features of improved conductivity,lithiophilic,physical/chemical capture ability toward LiPSs,and/or efficient catalytic conversion of LiPSs.Among all candidates,molybdenum-based(Mo-based)materials are highly preferred for their tunable crystal structure,adjustable composition,variable valence of Mo centers,and strong interactions with soluble LiPSs.Herein,the latest advances in design and application of Mo-based materials for Li-S batteries are comprehensively reviewed,covering molybdenum oxides,molybdenum dichalcogenides,molybdenum nitrides,molybdenum carbides,molybdenum phosphides,and molybdenum metal.In the end,the existing challenges in this research field are elaborately discussed.
出处
《Research》
SCIE
EI
CAS
CSCD
2021年第1期235-264,共30页
研究（英文）
基金
supported by the National Natural Science Foundation of China(Nos.21975123 and 61704076)
the Natural Science Basic Research Program of Shaanxi(No.2020JM-092)
the Six Talent Peaks Project in Jiangsu Prov-ince(No.XCL-024)
the Postgraduate Research&Practice Innovation Program of Jiangsu Province(Nos.KYCX20_0997 and SJCX20_0401)
the Fundamental Research Funds for the Central Universities.
