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Mg Doped Li–LiB Alloy with In Situ Formed Lithiophilic LiB Skeleton for Lithium Metal Batteries
Advanced Science ( IF 14.3 ) Pub Date : 2020-01-09 , DOI: 10.1002/advs.201902643 Chen Wu 1 , Haifeng Huang 1 , Weiyi Lu 1 , Zengxi Wei 2 , Xuyan Ni 3 , Fu Sun 4 , Piao Qing 1 , Zhijian Liu 1 , Jianmin Ma 2 , Weifeng Wei 1 , Libao Chen 1 , Chenglin Yan 3 , Liqiang Mai 5
Advanced Science ( IF 14.3 ) Pub Date : 2020-01-09 , DOI: 10.1002/advs.201902643 Chen Wu 1 , Haifeng Huang 1 , Weiyi Lu 1 , Zengxi Wei 2 , Xuyan Ni 3 , Fu Sun 4 , Piao Qing 1 , Zhijian Liu 1 , Jianmin Ma 2 , Weifeng Wei 1 , Libao Chen 1 , Chenglin Yan 3 , Liqiang Mai 5
Affiliation
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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 LiCoO2 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.
中文翻译：
用于锂金属电池的具有原位形成亲锂 LiB 骨架的镁掺杂 Li-LiB 合金
高能量密度锂金属电池（LMB）是有前途的下一代储能设备。然而，不可控的枝晶生长和巨大的体积变化限制了它们的实际应用。在此，提出了一种新型镁掺杂Li-LiB合金，具有原位形成的亲锂3D LiB骨架（以下称为Li-B-Mg复合材料），以抑制锂枝晶并减轻体积变化。LiB骨架表现出优异的亲锂和导电特性，这有助于降低局部电流密度和引入Li +通量的均匀化。随着镁的引入，该复合材料实现了超长的锂沉积/溶解寿命（500小时，0.5 mA cm -2），并且对称电池中不会出现短路。此外，用LiCoO 2正极和制造的复合材料组装的全电池的电化学性能优越。目前提出的3D Li-B-Mg复合阳极可能会显着推动LMB技术从实验室研究到工业商业化的进步。
更新日期：2020-01-09
中文翻译：
用于锂金属电池的具有原位形成亲锂 LiB 骨架的镁掺杂 Li-LiB 合金
高能量密度锂金属电池（LMB）是有前途的下一代储能设备。然而，不可控的枝晶生长和巨大的体积变化限制了它们的实际应用。在此，提出了一种新型镁掺杂Li-LiB合金，具有原位形成的亲锂3D LiB骨架（以下称为Li-B-Mg复合材料），以抑制锂枝晶并减轻体积变化。LiB骨架表现出优异的亲锂和导电特性，这有助于降低局部电流密度和引入Li +通量的均匀化。随着镁的引入，该复合材料实现了超长的锂沉积/溶解寿命（500小时，0.5 mA cm -2），并且对称电池中不会出现短路。此外，用LiCoO 2正极和制造的复合材料组装的全电池的电化学性能优越。目前提出的3D Li-B-Mg复合阳极可能会显着推动LMB技术从实验室研究到工业商业化的进步。
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