PF_(6)^(-)在MA/EC电解液中插嵌石墨正极的电化学行为  

Electrochemical Behavior of PF_(6)^(-) Intercalated Graphite Anode in MA/EC Electrolytes

作　　者：朱丹丹 任衍彪 张临财 刘泳 ZHU Dandan;REN Yanbiao;ZHANG Lincai;LIU Yong(School of Chemistry Engineering and Materials Science,Zaozhuang University,Zaozhuang 277160,China)

机构地区：[1]枣庄学院化学化工与材料科学学院,山东枣庄277160

出　　处：《枣庄学院学报》2022年第5期12-16,共5页Journal of Zaozhuang University

基　　金：枣庄学院博士启动基金(2022BS003)。

摘　　要：双离子电池是一种新型储能器件,采用常规的电化学方法研究1 M LiPF_(6)-乙酸甲酯/碳酸乙烯酯(MA/EC)电解液中石墨电极PF_(6)^(-)的电化学行为。首先,用恒流充放电、循环伏安、电化学阻抗等分析PF_(6)^(-)阴离子的插嵌/脱嵌行为,得出PF_(6)^(-)在MA电解液中更容易插嵌;其次,结合X射线衍射(XRD)追踪PF_(6)^(-)阴离子存储过程中晶体结构的变化以及插嵌物类型;最后,推断阴离子PF_(6)^(-)的储能机理。Dual-ion battery is a new type of energy storage device,in which the electrochemical behavior of PF_(6)^(-)in graphite electrode in 1 M LiPF_(6)^(-)MA/EC electrolyte was studied by conventional electrochemical methods.Firstly,static charge-discharge test,cyclic voltammetry and electrochemical impedance were used to measure the intercalation/de-intercalation behavior of anions.Then,X-ray diffraction(XRD)was used to trace the changes of crystal structure and judge the types of insertions.Finally,the storage mechanism of anion was deduced by these evidence.

关 键 词：石墨电极 双离子电池 六氟磷酸锂 石墨层间化合物 

分 类 号：O657.32[理学—分析化学]