Sandwich-type composited solid polymer electrolytes to strengthen the interfacial ionic transportation and bulk conductivity for all-solid-state lithium batteries from room temperature to 120 ℃

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外文摘要：The insurmountable charge transfer impedance at the Li metal/solid polymer electrolytes(SPEs)inter-face at room temperature as well as the ascending risk of short circuits at the operating temperature higher than the melting point,dominantly limits their applications in solid-state batteries(SSBs).Although the inorganic filler such as CeO2 nanoparticle content of composite solid polymer electrolytes(CSPEs)can significantly reduce the enormous charge transfer impedance at the Li metal/SPEs interface,we found that the required content of CeO2 nanoparticles in SPEs varies for achieving a decent interfacial charge transfer impedance and the bulk ionic conductivity in CSPEs.In this regard,a sandwich-type com-posited solid polymer electrolyte with a 10％CeO2 CSPEs interlayer sandwiched between two 50％CeO2 CSPEs thin layers(sandwiched CSPEs)is constructed to simultaneously achieve low charge transfer impe-dance and superior ionic conductivity at 30 ℃.The sandwiched CSPEs allow for stable cycling of Li plating and stripping for 1000 h with 129 mV polarized voltage at 0.1 mA cm-2 and 30 ℃.In addition,the LiFePO4/Sandwiched CSPEs/Li cell also exhibits exceptional cycle performance at 30 ℃ and even elevated 120 ℃ without short circuits.Constructing multi-layered CSPEs with optimized contents of the inorganic fillers can be an efficient method for developing all solid-state PEO-based batteries with high perfor-mance at a wide range of temperatures.

外文关键词：

PEO-based solid electrolytesCeO2 nanoparticlesCharge transfer impedanceSandwich-type composite electrolytesAll-solid-state Li metal batteries

作者：

Jiewen Tan、Zhen Wang、Jiawu Cui、Zhanhui Jia、Wensheng Tian、Chao Wu、Chengxin Peng、Chengyong Shu、Kang Yang、Wei Tang

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作者单位：

School of Chemical Engineering and Technology,Xi'an Jiaotong University,Xi'an 710049,Shaanxi,China

Center for Advancing Materials Performance from the Nanoscale(CAMP-Nano),State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,Shaanxi,China

State Key Laboratory of Space Power-Sources Technology,Shanghai Institute of Space Power-Sources,Shanghai 200245,China

School of Materials Science and Engineering,University of Shanghai for Science and Technology, Shanghai 200093,China

Top-Energy Digital Manufacturing Technologies(Xi'an)Co.,Ltd.,Xi'an 710100,Shaanxi,China

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基金：

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaKey Research and Development Plan of Shanxi Province,ChinaKey Research and Development Plan of Shanxi Province,ChinaNational Natural Science Foundation of Chinathe"Young Talent Support Plan"of Xi'an Jiaotong UniversityQinchuangyuan Innovative Talent Projectthe"Young Talent Support Plan"of Xi'an Jiaotong Universitythe"1000-Plan program"of Shaanxi Province

项目编号：

2021YFB240040022379120221790852018ZDXM-GY-1352021JLM-362210821871211201010723QCYRCXM-2022-137HG6J003

出版年：

2024

DOI：

10.1016/j.jechem.2024.03.033

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.95(8)