基于O3型层状材料NaNi_(0.33)Li_(0.11)Ti_(0.56)O_2的对称型钠离子电池
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- 英文论文题名：An advanced symmetric sodium ion cell based on O3-type NaNi_(0.33)Li_(0.11)Ti_(0.56)O_2
- 论文作者：张书明 ; 张娜 ; 贺诗阳 ; 尚蒙诗 ; 刘宇
- 英文论文作者：Shuming Zhang ; Na Zhang ; Shiyang He ; Mengshi Shang ; Yu Liu ; Shanghai Institute of Ceramics ; Chinese Academy of Sciences
- 年：2016
- 作者机构：中国科学院上海硅酸盐研究所;
- 论文关键词：钠离子电池 ; 对称型 ; 层状材料 ; 正负极材料
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十九分会：电化学材料
- 语种：中文
- 分类号：TM912
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十九分会 ; 电化学材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：435k
- 原文格式：D
- 会议级别：全国
摘要
P2型层状材料Na_(0.66)Ni_(0.33)Ti_(0.67)O_2具有两对氧化还原峰,分别对应具有高电压的为Ni~(2+)/Ni~(4+)(约3.6V)和具有低电压的为Ti~(4+)/Ti~(3+)(约0.6V)~([1]),这种材料可同时作为正负极用于钠离子电池,具有电池制备集成简单、电位窗口稳定等优点。该材料作为正极时性能较差,本研究通过在Na_(0.66)Ni_(0.33)Ti_(0.67)O_2中Ti的格位处引入Li原子,成功地合成出新的纯相O3型层状化合物NaNi_(0.33)Li_(0.11)Ti_(0.56)O_2,有效地提高了其正极材料的性能。将合成的材料分别用作正负极,组装成了一种对称型钠离子全电池,具有3.0V的电压差和80 mA h g~(-1)充放电可逆容量(基于负极活性物质),循环性能优于通常报道基于于Na_(0.66)Ni_(0.33)Ti_(0.67)O_2的全电池性能。
P2-type layer Na_(0.66)Ni_(0.33)Ti_(0.67)O_2 is a promising active host as both anode and cathode material for symmetric sodium ion cell due to the electrochemical window between high-voltage redox couple Ni~(2+)/Ni~(4+)(about 3.6V) and the low-voltage redox couple Ti~(4+)/Ti~(3+)(about 0.6V). In this work, a new compound of O3-type NaNi_(0.33)Li_(0.11)Ti_(0.56)O_2 was proposed and synthesized by introducing Li atom into Ti sites in P2-type Na_(0.66)Ni_(0.33)Ti_(0.67)O_2. A symmetric sodium-ion cell based on the O3-type NaNi_(0.33)Li_(0.11)Ti_(0.56)O_2 was assembled and investigated. The cell exhibits a high voltage of 3.0 V and a reversible charge/discharge capacity of 80 mA h g~(-1). The electrochemical performance of the as proposed cell is superior to that of the symmetric cell based on P2-type Na_(0.66)Ni_(0.33)Ti_(0.67)O_2.
P2-type layer Na_(0.66)Ni_(0.33)Ti_(0.67)O_2 is a promising active host as both anode and cathode material for symmetric sodium ion cell due to the electrochemical window between high-voltage redox couple Ni~(2+)/Ni~(4+)(about 3.6V) and the low-voltage redox couple Ti~(4+)/Ti~(3+)(about 0.6V). In this work, a new compound of O3-type NaNi_(0.33)Li_(0.11)Ti_(0.56)O_2 was proposed and synthesized by introducing Li atom into Ti sites in P2-type Na_(0.66)Ni_(0.33)Ti_(0.67)O_2. A symmetric sodium-ion cell based on the O3-type NaNi_(0.33)Li_(0.11)Ti_(0.56)O_2 was assembled and investigated. The cell exhibits a high voltage of 3.0 V and a reversible charge/discharge capacity of 80 mA h g~(-1). The electrochemical performance of the as proposed cell is superior to that of the symmetric cell based on P2-type Na_(0.66)Ni_(0.33)Ti_(0.67)O_2.
引文
[1]Shanmugam,R.;Lai,W.ECS Electrochemistry Letters 2014,3(4):A23-A25.