A new solid polymer electrolyte incorporating Li10GeP2S12 into a polyethylene oxide matrix for all-solid-state lithium batteries
A new solid polymer electrolyte incorporating Li10GeP2S12 into a polyethylene oxide matrix for all-solid-state lithium batteries
复制标题
一种将 Li10GeP2S12 融入聚环氧乙烷基体中的新型固体聚合物电解质，用于全固态锂电池
DOI：
10.1016/j.jpowsour.2015.09.111
复制
发表时间：
2016-01-01
影响因子：
9.2
通讯作者：
Xu, Xiaoxiong
中科院分区：
文献类型：
--
作者：
Zhao, Yanran;Wu, Chuan;Xu, Xiaoxiong
将Li 10 GeP 2S 12（LGPS）引入到聚氧化乙烯（PEO）基体中制备复合固体聚合物电解质（SPE）膜。结果表明，复合膜在80 ℃时的最大离子电导率为1.21 × 10（-3）S cm（-1），电化学窗口为0 ~ 5.7 V。LGPS微粒作为活性填料掺入到PEO基体中，对离子电导率、锂离子迁移数和电化学稳定性有积极的影响。此外，制备了两种全固态锂电池（LiFeO 4/SPE/Li和LiCoO 2/SPE/Li），证明了这种新型SPE膜与不同电极之间良好的相容性。并且LiFePO 4/Li电池表现出迷人的电化学性能，具有高容量保持率（在60 ℃下50次循环后92.5%），并且在60 ℃下在0.1 C、0.2 C、0.5 C和1 C的电流速率下分别具有158、148、138和99 mAh g（-1）的吸引人的容量。结果表明，这种新型复合SPE是一种很有前途的电解质，可应用于锂基固体电池中。(C)2015 Elsevier B. V.版权所有。
Li10GeP2S12 (LGPS) is incorporated into polyethylene oxide (PEO) matrix to fabricate composite solid polymer electrolyte (SPE) membranes. The lithium ion conductivities of as-prepared composite membranes are evaluated, and the optimal composite membrane exhibits a maximum ionic conductivity of 1.21 x 10(-3) S cm(-1) at 80 degrees C and an electrochemical window of 0-5.7 V. The phase transition behaviors for electrolytes are characterized by DSC, and the possible reasons for their enhanced ionic conductivities are discussed. The LGPS microparticles, acting as active fillers incorporation into the PEO matrix, have a positive effect on the ionic conductivity, lithium ion transference number and electrochemical stabilities. In addition, two kinds of all-solid-state lithium batteries (LiFeO4/SPE/Li and LiCoO2/SPE/Li) are fabricated to demonstrate the good compatibility between this new SPE membrane and different electrodes. And the LiFePO4/Li battery exhibits fascinating electrochemical performance with high capacity retention (92.5% after 50 cycles at 60 degrees C) and attractive capacities of 158, 148,138 and 99 mAh g(-1) at current rates of 0.1 C, 0.2 C, 0.5 C and 1 C at 60 degrees C, respectively. It is demonstrated that this new composite SPE should be a promising electrolyte applied in solid state batteries based on lithium metal electrode. (C) 2015 Elsevier B.V. All rights reserved.