IR
适用于5 V高电压电池体系的新型电解液的构建及其电化学性能研究
Project Number21406100
崔孝玲
Abstract现有电解液体系难以满足5V锂离子电池的发展需求。在优势互补原则的指导下,项目拟构建LiBOB(双草酸硼酸锂)-γ-丁内酯/环丁砜/碳酸二甲酯新型高电压电解液体系。以新型电解液组装实验电池,通过系统研究电解液/电极材料界面固体电解质界面膜的形成机理、组成、形貌、阻抗、厚度、机械强度、稳定性等性质,探讨电解液体系中LiBOB及各种溶剂在提高电解液耐高压能力方面、改善界面性质方面所发挥的具体作用及作用机理。通过研究电解液体系中酸性物质、过渡金属离子的主要产生方式,及水份、酸性物质、过渡金属离子含量对电解液耐高压能力、界面性能、电池性能的影响及影响机理,明确构建高电压电解液体系时需严格控制的指标。最终,将这些性质与电池各项性能相关联,探寻出电解液组成-界面性质-电池综合性能三者间具有普遍指导意义的关联模型,为高电压电解液体系的设计提供理论指导。【英文摘要】Recently,thebottleneckeffectofelectrolytebecomesespeciallyconspicuousintheeffortsofdevelopingacoveted5VclassLi-ionchemistry.Thisproposalaimstoprepareanovelhighvoltageelectrolytecomposedoflithiumbis(oxalato)borate(LiBOB)-γ-butyrolactone/sulfolane/diethylcarbonateonthebasisofcomplementaryadvantages.InfluencemechanismsofLiBOBsaltsaswellaselectrolytesolventsforimprovingbothstabilitypropertiesagainstoxidativedecompositionandinterfacialpropertieswillbediscussedbystudyingofproperties(e.g.,formationmechanisms,compositions,surfacemorphologies,electrochemicalimpedances,thicknesses,mechanicalstrengthsandstabilities)forsolidelectrolyteinterfacelayersbetweenelectrolytesandelectrodematerials.Besides,inordertoclarifythefactorsthatshouldbecontrolledstrictlyforhighvoltageelectrolyte,themainproducingwayofacidicagentsandtransitionmetalionsaswellastheeffectsofwater,acidicagentsandtransitionmetalionsonelectrolytestabilityagainstoxidativedecomposition,interfacepropertiesandcellperformanceswillalsobestudied.Itispossiblethattheimplementationofthisproposedprojectwillnotonlybuildcorrelationsandrelationalmodelsamongelectrolytecompositions,interfacialpropertiesandcell’sperformances,butalsoprovideausefultheoreticalguidancefordesignofnewhighvoltageelectrolytesforLi-ionbatteriesinthefuture.
Subtype青年科学基金项目
Project Source国家自然科学基金
2015-01
End Date2017-12
MOST Discipline Catalogue05 - 化学科学 ; 0507 - 化学工程与工业化学
Host Institution兰州理工大学
Project Funding250000.0
CountryCN
Language中文
Document Type项目
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64750
Collection兰州理工大学
Recommended Citation
GB/T 7714
崔孝玲.适用于5 V高电压电池体系的新型电解液的构建及其电化学性能研究.2015.
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