@article{Liu_Xu_Wang_Zhao_Li_Wu_2020, title={Sustained-Release Nanocapsules Enable Long-Lasting Stabilization of Li Anode for Practical Li-Metal Batteries}, volume={12}, url={https://www.nmlett.org/index.php/nml/article/view/8}, DOI={10.1007/s40820-020-00514-1}, abstractNote={<p>A robust solid-electrolyte interphase (SEI) enabled by electrolyte additive is a promising approach to stabilize Li anode and improve Li cycling efficiency. However, the self-sacrificial nature of SEI forming additives limits their capability to stabilize Li anode for long-term cycling. Herein, we demonstrate nanocapsules made from metal–organic frameworks for sustained release of LiNO<sub>3</sub> as surface passivation additive in commercial carbonate-based electrolyte. The nanocapsules can offer over 10 times more LiNO<sub>3</sub> than the solubility of LiNO<sub>3</sub>. Continuous supply of LiNO<sub>3</sub> by nanocapsules forms a nitride-rich SEI layer on Li anode and persistently remedies SEI during prolonged cycling. As a result, lifespan of thin Li anode in 50 μm, which experiences drastic volume change and repeated SEI formation during cycling, has been notably improved. By pairing with an industry-level thick LiCoO<sub>2</sub> cathode, practical Li-metal full cell demonstrates a remarkable capacity retention of 90% after 240 cycles, in contrast to fast capacity drop after 60 cycles in LiNO<sub>3</sub> saturated electrolyte.</p> <p>Highlights:<br /><br />1 Nanocapsules made from metal–organic frameworks were designed for sustained release of additive (LiNO3) to passivate Li anode in commercial carbonate-based electrolyte.<br />2 The nanocapsules with continuous supply of LiNO3 formed a nitride-rich solid electrolyte interphase layer on Li anode and persistently remedied the interphase during prolonged cycling.<br />3 The practical Li-metal full cell delivered a prolonged lifespan with 90% capacity retention after 240 cycles which has been hardly achieved in commercial electrolyte.</p>}, journal={Nano-Micro Letters}, author={Liu, Qianqian and Xu, Yifei and Wang, Jianghao and Zhao, Bo and Li, Zijian and Wu, Hao Bin}, year={2020}, month={Aug.}, pages={176} }