Open AccessMg Doped Li–LiB Alloy with In Situ Formed Lithiophilic LiB Skeleton for Lithium Metal Batteries
Author(s) -
Wu Chen,
Huang Haifeng,
Lu Weiyi,
Wei Zengxi,
Ni Xuyan,
Sun Fu,
Qing Piao,
Liu Zhijian,
Ma Jianmin,
Wei Weifeng,
Chen Libao,
Yan Chenglin,
Mai Liqiang
Publication year - 2020
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201902643
Subject(s) - materials science , composite number , anode , battery (electricity) , cathode , electrochemistry , alloy , energy storage , dissolution , dendrite (mathematics) , nanotechnology , lithium (medication) , chemical engineering , composite material , electrode , chemistry , medicine , power (physics) , physics , geometry , mathematics , quantum mechanics , engineering , endocrinology
High energy density lithium metal batteries (LMBs) are promising next‐generation energy storage devices. However, the uncontrollable dendrite growth and huge volume change limit their practical applications. Here, a new Mg doped Li–LiB alloy with in situ formed lithiophilic 3D LiB skeleton (hereinafter called Li–B–Mg composite) is presented to suppress Li dendrite and mitigate volume change. The LiB skeleton exhibits superior lithiophilic and conductive characteristics, which contributes to the reduction of the local current density and homogenization of incoming Li + flux. With the introduction of Mg, the composite achieves an ultralong lithium deposition/dissolution lifespan (500 h, at 0.5 mA cm −2 ) without short circuit in the symmetrical battery. In addition, the electrochemical performance is superior in full batteries assembled with LiCoO 2 cathode and the manufactured composite. The currently proposed 3D Li–B–Mg composite anode may significantly propel the advancement of LMB technology from laboratory research to industrial commercialization.