Dan Luo1,2, Lei Zheng3, Zhen Zhang2, Matthew Li2, Zhongwei Chen4, Ruiguang Cui3, Yanbin Shen3, Gaoran Li2, Renfei Feng5, Shaojian Zhang6, Gaopeng Jiang2, Liwei Chen7,8, Aiping Yu2, Xin Wang9,10. 1. Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering & International Academy of Optoelectronics at Zhaoqing, South China Normal University, Guangdong, 510006, China. 2. Department of Chemical Engineering, Waterloo Institute of Nanotechnology, University of Waterloo, Waterloo, ON, N2L 3G1, Canada. 3. i-LAB, and Vacuum Interconnected Nanotech Workstation (Nano-X), Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, 215123, Suzhou, Jiangsu, China. 4. Department of Chemical Engineering, Waterloo Institute of Nanotechnology, University of Waterloo, Waterloo, ON, N2L 3G1, Canada. zhwchen@uwaterloo.ca. 5. Canadian Light Source, Saskatoon, SK, S7N 0X4, Canada. 6. College of Energy, Xiamen University, Xiamen, 361005, China. 7. i-LAB, and Vacuum Interconnected Nanotech Workstation (Nano-X), Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, 215123, Suzhou, Jiangsu, China. lwchen2008@sinano.ac.cn. 8. In-situ Center for Physical Sciences, and Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China. lwchen2008@sinano.ac.cn. 9. Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering & International Academy of Optoelectronics at Zhaoqing, South China Normal University, Guangdong, 510006, China. wangxin@scnu.edu.cn. 10. South China Academy of Advanced Optoelectronics, South China Normal University, Guangdong, 510631, China. wangxin@scnu.edu.cn.
Abstract
Stable solid electrolyte interface (SEI) is highly sought after for lithium metal batteries (LMB) owing to its efficient electrolyte consumption suppression and Li dendrite growth inhibition. However, current design strategies can hardly endow a multifunctional SEI formation due to the non-uniform, low flexible film formation and limited capability to alter Li nucleation/growth orientation, which results in unconstrained dendrite growth and short cycling stability. Herein, we present a novel strategy to employ electrolyte additives containing catechol and acrylic groups to construct a stable multifunctional SEI by in-situ anionic polymerization. This self-smoothing and robust SEI offers multiple sites for Li adsorption and steric repulsion to constrain nucleation/growth process, leading to homogenized Li nanosphere formation. This isotropic nanosphere offers non-preferred Li growth orientation, rendering uniform Li deposition to achieve a dendrite-free anode. Attributed to these superiorities, a remarkable cycling performance can be obtained, i.e., high current density up to 10 mA cm-2, ultra-long cycle life over 8500 hrs operation, high cumulative capacity over 4.25 Ah cm-2 and stable cycling under 60 °C. A prolonged lifespan can also be achieved in Li-S and Li-LiFePO4 cells under lean electrolyte content, low N/P ratio or high temperature conditions. This facile strategy also promotes the practical application of LMB and enlightens the SEI design in related fields.
Stable solid electrolyte interface (SEI) is highly sought after for n class="Chemical">lithium metaln> batteries (LMB) owing to its efficient electrolyte consumption suppression and Li dendrite growth inhibition. However, current design strategies can hardly endow a multifunctional SEI formation due to the non-uniform, low flexible film formation and limited capability to alter Li nucleation/growth orientation, which results in unconstrained dendrite growth and short cycling stability. Herein, we present a novel strategy to employ electrolyte additives containing catechol and acrylic groups to construct a stable multifunctional SEI by in-situ anionic polymerization. This self-smoothing and robust SEI offers multiple sites for Li adsorption and steric repulsion to constrain nucleation/growth process, leading to homogenized Li nanosphere formation. This isotropic nanosphere offers non-preferred Li growth orientation, rendering uniform Li deposition to achieve a dendrite-free anode. Attributed to these superiorities, a remarkable cycling performance can be obtained, i.e., high current density up to 10 mA cm-2, ultra-long cycle life over 8500 hrs operation, high cumulative capacity over 4.25 Ah cm-2 and stable cycling under 60 °C. A prolonged lifespan can also be achieved in Li-S and Li-LiFePO4 cells under lean electrolyte content, low N/P ratio or high temperature conditions. This facile strategy also promotes the practical application of LMB and enlightens the SEI design in related fields.
Authors: Yue Gao; Zhifei Yan; Jennifer L Gray; Xin He; Daiwei Wang; Tianhang Chen; Qingquan Huang; Yuguang C Li; Haiying Wang; Seong H Kim; Thomas E Mallouk; Donghai Wang Journal: Nat Mater Date: 2019-03-11 Impact factor: 43.841
Authors: Wanqing Guan; Xiaoqi Hu; Yuhang Liu; Jinmeng Sun; Chen He; Zhuzhu Du; Jingxuan Bi; Ke Wang; Wei Ai Journal: Research (Wash D C) Date: 2022-08-01