Chai Jingchao, Chen Bingbing, Xian Fang, Wang Peng, Du Huiping, Zhang Jianjun, Liu Zhihong, Zhang Huanrui, Dong Shanmu, Zhou Xinhong, Cui Guanglei
Qingdao Industrial Energy Storage Technology Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 26101, Qingdao, China.
University of Chinese Academy of Sciences, 100049, Beijing, China.
Small. 2018 Sep;14(37):e1802244. doi: 10.1002/smll.201802244. Epub 2018 Aug 22.
Notorious lithium dendrite causes severe capacity fade and harsh safety issues of lithium metal batteries, which hinder the practical applications of lithium metal electrodes in higher energy rechargeable batteries. Here, a kind of 3D-cross-linked composite network is successfully employed as a flexible-rigid coupling protective layer on a lithium metal electrode. During the plating/stripping process, the composite protective layer would enable uniform distribution of lithium ions in the adjacent regions of the lithium electrode, resulting in a dendrite-free deposition at a current density of 2 mA cm . The LiNi Mn O -based lithium metal battery presents an excellent cycling stability at a voltage range of 3.5-5.0 V with the induction of 3D-cross-linked composite protective layer. From an industrial field application of view, thin lithium metal electrodes (40 µm, with 4 times excess lithium) can be used in LiNi Mn O (with industrially significant loading of 18 mg cm and 2.6 mAh cm )-based lithium metal batteries, which reveals a promising opportunity for practical applicability in high energy lithium metal batteries.
臭名昭著的锂枝晶会导致锂金属电池严重的容量衰减和严峻的安全问题，这阻碍了锂金属电极在高能量可充电电池中的实际应用。在此，一种三维交联复合网络成功地用作锂金属电极上的柔性-刚性耦合保护层。在镀锂/脱锂过程中，复合保护层能使锂离子在锂电极的相邻区域均匀分布，从而在2 mA cm 的电流密度下实现无枝晶沉积。基于LiNiMn O 的锂金属电池在3.5-5.0 V的电压范围内，由于三维交联复合保护层的引入，呈现出优异的循环稳定性。从工业现场应用的角度来看，薄锂金属电极（40 µm，锂过量4倍）可用于基于LiNiMn O （工业上重要的负载量为18 mg cm 和2.6 mAh cm ）的锂金属电池，这为高能量锂金属电池的实际应用揭示了一个有前景的机会。
