能源化学(英文版) ›› 2020, Vol. 48 ›› Issue (9): 375-382.DOI: 10.1016/j.jechem.2020.02.009

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Slurry-like hybrid electrolyte with high lithium-ion transference number for dendrite-free lithium metal anode

Hewei Xua, Ying Hea, Zibo Zhanga, Junli Shia, Pingying Liub, Ziqi Tiana, Kan Luoa, Xiaozhe Zhanga, Suzhe Lianga, Zhaoping Liua   

  1. a Advanced Li-ion Battery Engineering Laboratory and Key Laboratory of Graphene Technologies and Applications of Zhejiang Province.Ningbo Institute of Materials Technology and Engineering(NIMTE).Chinese Academy of Sciences.Ningbo 315201.Zhejiang.China;
    b School of Materials Science and Engineering.Jingdezhen Ceramic Institute.Jingdezhen 333403.Jiangxi.China
  • 收稿日期:2020-01-03 修回日期:2020-02-05 出版日期:2020-09-15 发布日期:2020-12-18
  • 通讯作者: Junli Shi, Zhaoping Liu
  • 基金资助:
    This work was supported by the National Key R&D Program of China (Grant No.2016YFB0100100).The authors would like to acknowledge the financial supports from the National Natural Science Foundation of China (Grant No.51872305).This research used computational resources of the High-Performance Computing Center of Collaborative Innovation Center of Advanced Microstructures,Nanjing University.

Slurry-like hybrid electrolyte with high lithium-ion transference number for dendrite-free lithium metal anode

Hewei Xua, Ying Hea, Zibo Zhanga, Junli Shia, Pingying Liub, Ziqi Tiana, Kan Luoa, Xiaozhe Zhanga, Suzhe Lianga, Zhaoping Liua   

  1. a Advanced Li-ion Battery Engineering Laboratory and Key Laboratory of Graphene Technologies and Applications of Zhejiang Province.Ningbo Institute of Materials Technology and Engineering(NIMTE).Chinese Academy of Sciences.Ningbo 315201.Zhejiang.China;
    b School of Materials Science and Engineering.Jingdezhen Ceramic Institute.Jingdezhen 333403.Jiangxi.China
  • Received:2020-01-03 Revised:2020-02-05 Online:2020-09-15 Published:2020-12-18
  • Contact: Junli Shi, Zhaoping Liu
  • Supported by:
    This work was supported by the National Key R&D Program of China (Grant No.2016YFB0100100).The authors would like to acknowledge the financial supports from the National Natural Science Foundation of China (Grant No.51872305).This research used computational resources of the High-Performance Computing Center of Collaborative Innovation Center of Advanced Microstructures,Nanjing University.

摘要: Lithium metal anode is regarded as the ultimate choice for next-generation energy storage systems.due to the lowest negative electrochemical potential and super high theoretical specific capacity.However.the growth of lithium dendrite during the cycling process is still one of the most critical bottlenecks for its application.In this work.a slurry-like hybrid electrolyte is proposed towards the application for lithium metal anode.which is composed of a liquid electrolyte part and a nanometric silane-Al2O3 particle part.The hybrid electrolyte shows high ionic conductivity (3.89×10-3 S cm-1 at 25℃) and lithium-ion transference number (0.88).Especially.the resistance of hybrid electrolyte decreases compared to that of liquid electrolyte.while the viscosity of hybrid electrolyte increases.It is demonstrated that the hybrid electrolyte can effectively suppress the growth of lithium dendrite.Stable cycling of Li/Li cells at a current density up to 1 mA cm-2 is possible.The hybrid electrolyte helps to uniform the lithium ion flux inside the battery and partly comes from the formation of a rigid and highly conductive hybrid interfacial layer on the surface of lithium metal.This work not only provides a fresh way to stabilize lithium metal anode but also sheds light on further research for electrolyte optimization and design of lithium metal battery system.

关键词: Hybrid electrolyte, Slurry, Organic-inorganic, Lithium-ion transference number, Lithium metal batteries

Abstract: Lithium metal anode is regarded as the ultimate choice for next-generation energy storage systems.due to the lowest negative electrochemical potential and super high theoretical specific capacity.However.the growth of lithium dendrite during the cycling process is still one of the most critical bottlenecks for its application.In this work.a slurry-like hybrid electrolyte is proposed towards the application for lithium metal anode.which is composed of a liquid electrolyte part and a nanometric silane-Al2O3 particle part.The hybrid electrolyte shows high ionic conductivity (3.89×10-3 S cm-1 at 25℃) and lithium-ion transference number (0.88).Especially.the resistance of hybrid electrolyte decreases compared to that of liquid electrolyte.while the viscosity of hybrid electrolyte increases.It is demonstrated that the hybrid electrolyte can effectively suppress the growth of lithium dendrite.Stable cycling of Li/Li cells at a current density up to 1 mA cm-2 is possible.The hybrid electrolyte helps to uniform the lithium ion flux inside the battery and partly comes from the formation of a rigid and highly conductive hybrid interfacial layer on the surface of lithium metal.This work not only provides a fresh way to stabilize lithium metal anode but also sheds light on further research for electrolyte optimization and design of lithium metal battery system.

Key words: Hybrid electrolyte, Slurry, Organic-inorganic, Lithium-ion transference number, Lithium metal batteries