Supramolecular Salt-Assisted Quasi-Solid-State Electrolyte Promoting Dual Conductive Interface for High-Energy-Density Lithium Metal Batteries

被引：8

作者：

Chai, Simin ^{[1
]}

Zhong, Yue ^{[1
]}

Wang, Yijiang ^{[1
]}

He, Qiong ^{[1
]}

Azizi, Alireza ^{[1
]}

Chen, Leyuan ^{[1
]}

Ren, Xueting ^{[1
]}

Wei, Weifeng ^{[2
]}

Liang, Shuquan ^{[1
]}

Chang, Zhi ^{[1
]}

Pan, Anqiang ^{[1
,3
]}

机构：

[1] Cent South Univ, Sch Mat Sci & Engn, Key Lab Elect Packaging & Adv Funct Mat Hunan Prov, Changsha 410083, Hunan, Peoples R China

[2] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[3] Xinjiang Univ, Sch Phys & Technol, Urumqi 830046, Xinjiang, Peoples R China

来源：

ADVANCED ENERGY MATERIALS | 2024年 / 14卷 / 04期

基金：

中国国家自然科学基金;

关键词：

dual conductive interface; lithium metal battery; quasi-state polymer electrolyte; solvated structure; supramolecular salt; PERFORMANCE; INTERPHASE;

D O I：

10.1002/aenm.202303020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ion electrokinetic regulation in gel polymer electrolytes (GPEs) is of great significance in alleviating dendrite growth and electrode corrosion of metallic lithium in lithium metal batteries (LMBs). Herein, a supramolecular LiPAAOB salt-assisted GPEs (3D-DIS-1.25% GPEs) is synthesized to improve the ionic electrodynamics of LMBs. The LiPAAOB conductor salt provides sufficient Li+ ions while simultaneously facilitating LiTFSI dissociation. Theses dissociated Li+ ions can be further anchored firmly by enriched affinitive sites (CO, CO) induced in 3D composite polymer skeleton (PALC). Due to the strong hydrogen-bonding interactions between PALC and LiPAAOB/LiTFSI, a stable coordination structure is thereby constructed in 3D-DIS-1.25% GPEs, which then facilitates Li+ ions to transport rapidly along polymer chains. Consequently, the electrochemical stable window and ionic conductivity of the 3D-DIS-1.25% GPEs are increased to as high as 5.3 V and 1.34 mS cm-1, respectively. The Li+/e- double conducting interfaces in situ formed on Li metal anode and active particles in cathodes can effectively inhibit dendrite growth and electrode corrosion. As a result, both Li||3D-DIS-1.25% GPEs||Li symmetrical battery and flexible 3D-DIS-1.25% GPEs-based pouch cell with high LFP loading operate stably even under folded and curly state, indicating the application possibility of using 3D-DIS-1.25% GPEs in constructing various flexible high-energy-density batteries. The modulating effects of supramolecular LiPAAOB salt and 3D PALC polymer host on enhancing intermolecular interactions and promoting the ordered transport of Li+ ions in quasi-solid-state polymer electrolyte are systematically investigated. Both 3D polymer host and supramolecular LiPAAOB provide enriched affinitive sites that can firmly anchor and direct the transport of dissociated Li+ ions, further forming compact SEI/CEI interface layers.image

引用

页数：12

共 40 条

[1] A stable quasi-solid electrolyte improves the safe operation of highly efficient lithium-metal pouch cells in harsh environments [J].