An Aqueous Rechargeable Lithium Battery Using Coated Li Metal as Anode

作者：Wang Xujiong; Hou Yuyang; Zhu Yusong; Wu Yuping^*; Holze Rudolf

来源：Scientific Reports, 2013, 3(1): 1401.

DOI：10.1038/srep01401

New energy industry including electric vehicles and large-scale energy storage in smart grids requires energy storage systems of good safety, high reliability, high energy density and low cost. Here a coated Li metal is used as anode for an aqueous rechargeable lithium battery (ARLB) combining LiMn2O4 as cathode and 0.5 mol l(-1) Li2SO4 aqueous solution as electrolyte. Due to the "cross-over'' effect of Li+ ions in the coating, this ARLB delivers an output voltage of about 4.0 V, a big breakthrough of the theoretic stable window of water, 1.229 V. Its cycling is very excellent with Coulomb efficiency of 100% except in the first cycle. Its energy density can be 446 Whkg(-1), about 80% higher than that for traditional lithium ion battery. Its power efficiency can be above 95%. Furthermore, its cost is low and safety is much reliable. It provides another chemistry for post lithium ion batteries.

• 出版日期2013-3-7
• 单位复旦大学