Rigid-Flexible Coupling High Ionic Conductivity Polymer Electrolyte for an Enhanced Performance of LiMn2O4/Graphite Battery at Elevated Temperature

doi:10.1021/am5083683

QIBEBT-IR > 仿生与固态能源系统研究组

	Rigid-Flexible Coupling High Ionic Conductivity Polymer Electrolyte for an Enhanced Performance of LiMn2O4/Graphite Battery at Elevated Temperature
	Hu, Pu 1,2; Duan, Yulong 1; Hu, Deping 1,2; Qin, Bingsheng 1; Zhang, Jianjun1 ; Wang, Qingfu1 ; Liu, Zhihong 1; Cui, Guanglei1 ; Chen, Liquan 3
	2015-03-04
发表期刊	ACS APPLIED MATERIALS & INTERFACES
卷号	7 期号:8 页码:4720-4727
摘要	LiMn2O4-based batteries exhibit severe capacity fading during cycling or storage in LiPF6-based liquid electrolytes, especially at elevated temperatures. Herein, a novel rigid-flexible gel polymer electrolyte is introduced to enhance the cyclability of LiMn2O4/graphite battery at elevated temperature. The polymer electrolyte consists of a robust natural cellulose skeletal incorporated with soft segment poly(ethyl alpha-cyanoacrylate). The introduction of the cellulose effectively overcomes the drawback of poor mechanical integrity of the gel polymer electrolyte. Density functional theory (DFT) calculation demonstrates that the poly(ethyl alpha-cyanoacrylate) matrices effectively dissociate the lithium salt to facilitate ionic transport and thus has a higher ionic conductivity at room temperature. Ionic conductivity of the gel polymer electrolyte is 3.3 x 10(-3) S cm(-1) at room temperature. The gel polymer electrolyte remarkably improves the cycling performance of LiMn2O4-based batteries, especially at elevated temperatures. The capacity retention after the 100th cycle is 82% at 55 degrees C, which is much higher than that of liquid electrolyte (1 M LiPF6 in carbonate solvents). The polymer electrolyte can significantly suppress the dissolution of Mn2+ from surface of LiMn2O4 because of strong interaction energy of Mn2+ with PECA, which was investigated by DFT calculation.
文章类型	Article
关键词	Li-ion Battery Polymer Electrolyte Poly(Ethyl Alpha-cyanoacrylate) Limn2o4
WOS标题词	Science & Technology ; Technology
DOI	10.1021/am5083683
关键词[WOS]	LI-ION ; SPINEL ELECTRODES ; CAPACITY LOSSES ; CELLS ; CATHODE ; DISSOLUTION ; DEPOSITION ; GRAPHITE ; BEHAVIOR ; OXIDES
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Materials Science
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000353005300034
引用统计
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/6427
专题	仿生与固态能源系统研究组
作者单位	1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Ind Energy Storage Res Inst, Qingdao 266101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Hu, Pu,Duan, Yulong,Hu, Deping,et al. Rigid-Flexible Coupling High Ionic Conductivity Polymer Electrolyte for an Enhanced Performance of LiMn2O4/Graphite Battery at Elevated Temperature[J]. ACS APPLIED MATERIALS & INTERFACES,2015,7(8):4720-4727.
APA	Hu, Pu.,Duan, Yulong.,Hu, Deping.,Qin, Bingsheng.,Zhang, Jianjun.,...&Chen, Liquan.(2015).Rigid-Flexible Coupling High Ionic Conductivity Polymer Electrolyte for an Enhanced Performance of LiMn2O4/Graphite Battery at Elevated Temperature.ACS APPLIED MATERIALS & INTERFACES,7(8),4720-4727.
MLA	Hu, Pu,et al."Rigid-Flexible Coupling High Ionic Conductivity Polymer Electrolyte for an Enhanced Performance of LiMn2O4/Graphite Battery at Elevated Temperature".ACS APPLIED MATERIALS & INTERFACES 7.8(2015):4720-4727.