Shuang Xia, Zhifeng Lin, Bohao Peng, Xuelong Yuan, Jingzhen Du, Xinhai Yuan, Lili Liu, Lijun Fu, Rudolf Holze and Yuping Wu
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引用次数: 0
Abstract
Lithium metal batteries (LMBs) can alleviate ‘range anxiety’ and have broad prospects due to their high energy densities. However, poor safety and cycling performances of the LMBs due to the unconstrained lithium metal anodes (LMAs) limit their further application. Many solutions have been proposed to address the problems of LMBs, but few studies have focused on cheap separators. Here, a separator modified with conductive Super P and Mg(NO3)2 (MN) (SP@MND) is prepared for LMBs. Super P can promote the reaction kinetics of cathodes. MN can be sustainably released from the modified separator into the electrolyte and can dissociate into Mg2+ and NO3−, which standardizes the deposition of Li+ cations and forms an ionic-conductive protective layer on the LMA, respectively. SP@MND shows an outstanding performance in both ether-based and ester-based electrolytes, and LMAs can exhibit a long cycling life of over 4800 h at 0.5 mA cm−2 and 0.5 mA h cm−2 and a high current density of up to 50 mA cm−2. The assembled LMBs exhibit a low capacity decay rate of 0.059% after 1000 cycles at 3C for a Li//S battery and a high average coulombic efficiency of 99.2% at 10C for the Li//LiFePO4 one after 1000 cycles. This work provides a solid basis for the production of LMBs with a high ratio of performance to cost.
期刊介绍:
Energy & Environmental Science, a peer-reviewed scientific journal, publishes original research and review articles covering interdisciplinary topics in the (bio)chemical and (bio)physical sciences, as well as chemical engineering disciplines. Published monthly by the Royal Society of Chemistry (RSC), a not-for-profit publisher, Energy & Environmental Science is recognized as a leading journal. It boasts an impressive impact factor of 8.500 as of 2009, ranking 8th among 140 journals in the category "Chemistry, Multidisciplinary," second among 71 journals in "Energy & Fuels," second among 128 journals in "Engineering, Chemical," and first among 181 scientific journals in "Environmental Sciences."
Energy & Environmental Science publishes various types of articles, including Research Papers (original scientific work), Review Articles, Perspectives, and Minireviews (feature review-type articles of broad interest), Communications (original scientific work of an urgent nature), Opinions (personal, often speculative viewpoints or hypotheses on current topics), and Analysis Articles (in-depth examination of energy-related issues).