Zhao, Bing; Hu, Xiongtao; Hu, Xiaofeng; Hu, Libin; Ma, Wencheng; Li, Wenrong; Liu, Xiaoyu; Zhang, Jiujun; Jiang, Yong published the artcile< Thermal initiation/ultraviolet cross-linking process in polyethylene oxide@Li6·75La3Zr1·75Ta0·25O12-based composite electrolyte with high room-temperature ionic conductivity and long life cycle>, Category: esters-buliding-blocks, the main research area is solid state lithium metal battery polymer electrolyte.
Organic-inorganic composite electrolytes (PL-SCEs) based on polyethylene oxide (PEO) and Li6·75La3Zr1·75Ta0·25O12 (LLZTO) are considered to be one of the most promising solid electrolytes. However, the low room-temperature ionic conductivity caused by the inherent high crystallinity of PEO severely hinders its practical application. Herein, a novel PL-SCE is synthesized through a facile thermal induction and UV crosslinking process, using fluoroethylene carbonate (FEC) and 4-methylbenzophenone as thermal/UV triggers, and tetraethylene glycol di-Me ether (TEGDME) as an ion conductive plasticizer. The F atom in the FEC can attack the C-O bond in the PEO chain and abstract the hydrogen attached to the C atom to form an active site, prompt TEGDME and PEO to achieve a higher degree of crosslinking, thus endowing PL-SCE with high Li-ion conductivity of 5.35 x 10-4 S cm-1 at 25°C. Besides, the obtained PL-SCE exhibits excellent wettability and compatibility with Li metal anodes, the interfacial impedance is only 44 Ω cm2. The LiFePO4||Li full cell based on the proposed PL-SCE exhibits an excellent room-temperature cycling performance with a capacity retention rate up to 88% and the average Coulombic efficiency above 98% upon 450 cycles at 1 C. Prospectively, this work provides a promising alternative method for the practical application of PL-SCEs.
Journal of Power Sources published new progress about Crosslinking. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics