报告题目(中文)：基于氧化物固体电解质的全固态锂金属电池
报告内容简介：All-solid-state batteries with solid electrolytes and metallic Li anodes can offer superior energy density and safety over conventional batteries; crystalline Li7-3xGaxLa3Zr2O12 garnets are promising electrolytes. Herein, the influence of Ga doping on the properties of Li7-3xGaxLa3Zr2O12 garnets is thoroughly investigated, with the determined concentration and mobility of lithium ions shedding light on the origin of the high conductivity of Li7-3xGaxLa3Zr2O12. The high lithium-ion conductivity of 1.46 mS/cm at 25 刟C is achieved for Li7-3xGaxLa3Zr2O12 at x = 0.25, at which the activation energy for conductivity reaches its minimum of 0.25 eV. Doping at the La site with large radius cations can enlarge the bottleneck size of the lithium-ion conduction pathway, and enhance the conductivity, therefore, large radius Rb is doped at the La site of cubic Li6.10Ga0.30La3Zr2O12 to enhance the lithium-ion conductivity. The Li6.20Ga0.30La2.95Rb0.05Zr2O12 electrolyte exhibits a lithium-ion conductivity of 1.62 mS/cm at room temperature, which is one of the highest conductivities reported until now. Our works open the door to the strategic doping of other electrolytes to enhance the ionic conductivity. All-solid-state lithium ion batteries were constructed from the Li7-3xGaxLa3Zr2O12 (x = 0.25) electrolyte, metallic Li anode and LiFePO4 active cathode. The battery shows a high initial discharge capacity of 160 mAh/g and good cycling stability with 130 mAh/g retained after 20 cycles at a charge/discharge rate of 0.1 C at 60 C. Therefore, the Li6.20Ga0.30La2.95Rb0.05Zr2O12 garnet is very promising for all-solid-state batteries.
报告人姓名：郭新
报告人简介(中文)：郭新，华中科技大学材料学院教授，中组部“千人计划”国家特聘专家（2010年6月入选第四批），中国固态离子学会理事，国际期刊 “Solid State Ionics”编委，国际固态离子学会（International Society for Solid State Ionics）学术奖评审委员。回国前任德国于利希研究中心（Research Center Juelich）终身高级研究员，之前，他曾在德国马普固体研究所（Max Planck Institute for Solid State Research）从事研究工作多年。2005年获美国陶瓷协会Ross Coffin Purdy Award。在国际学术会议（如MRS, E-MRS, ECS, MS&T, SSI等）及国际著名高校和研究机构（如麻省理工学院、斯坦福大学、瑞士联邦工学院、德国马普研究所等）作过数十场邀请报告，并多次在国际会议上担任分会主席。在包括“Science”的学术期刊发表论文百余篇。研究领域可概括为“固态离子导体与混合导体及其在信息、环境与能源等领域的应用”，具体研究领域有: 1. 人工智能器件，2. 全固态锂电池，3. 气敏传感器。
报告人单位(中文)：华中科技大学  
报告时间：2018-06-11 09:00
报告地点：上大东区MGI大楼510会议室
主办单位：上海大学材料学院
联系人：施思齐
联系方式：15800543880