DMF stabilized Li3N slurry for manufacturing self-prelithiatable lithium-ion capacitors

作     者：Cuilian Liu Tianyu Li Hongzhang Zhang Zihan Song Chao Qu Guangjin Hou Huamin Zhang Chuanfa Ni Xianfeng Li 刘翠连;李天宇;张洪章;宋子晗;曲超;侯广进;张华民;倪传法;李先锋

作者机构：Division of Energy StorageDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Solid-state NMR&Catalytic Chemistry GroupDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Shanghai Institute of Organic ChemistryChinese Academy of Sciences.Shanghai 200032China 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2020年第65卷第6期

页      面：434-442,M0003页

核心收录：

学科分类：080801[工学-电机与电器] 081704[工学-应用化学] 0808[工学-电气工程] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：the National Natural Science Foundation of China(51673199 and 51677176) Youth Inn ovation Promotion Association of Chinese Academy of Sciences(2015148) Dalian National Laboratory for Clean Energy(DNL180307) Innovation Foundation of Dalian Institute of Chemical Physics Chinese Academy of Sciences(ZZBS201615 and ZZBS201708) Dalian Science and Technology Star Program(2016RQ026) The authors also thank Lei Shi for the helpful discussion on Li3N related reaction 

主　　题：Li3N Soft package Pre-lithiation Lithium-ion capacitors High specific energy and long cycle life 

摘      要：Li3N is an excellent zero-residue positive electrode pre-lithiation additive to offset the initial lithium loss in lithium-ion capacitors. However, Li3N has an intrinsic problem of poor compatibility with commonly used aprotic polar solvents in electrode manufacture procedure due to its high reactivity with commonly used solvents like N-methy-2-pyrrolidone(NMP) and etc. It is the Valley of Death between research and large-scale commercialization of Li-ion capacitors using Li3N as prelithiation agent. In this work, Li3N containing electrode is prepared by a commercially adoptable route for the first time, using N,Ndimethylformamide(DMF) to homogenate the electrode slurry. The DMF molecular stabilizing mechanism is confirmed via experiment analysis and DFT simulation, indicating that the dehydrogenation energy for DMF is obviously larger than other commonly used solvents such as NMP and etc. The soft package lithium-ion capacitors(LIC250) with only 12 wt% Li3N addition in AC positive electrode exhibits excellent rate capability, cyclic stability and ultrahigh specific energy. Its specific energy is 2.3 times higher than the Li3N-free devices, with energy retention as high as 90% after 10,000 cycles.