锂离子电池锂锰氧化物高压嵌锂材料的结构和电化学性能研究

CORC > 厦门大学 > 1999年第5卷

	锂离子电池锂锰氧化物高压嵌锂材料的结构和电化学性能研究; Structural and Electrochemical Studies on Lithium Manganese Oxide Containing Li + Prepared by Hydrothermal Method for Lithium Ion Batteries
	刘德尧 ; 尤金跨 ; 储炜 ; 杨勇 ; 林祖赓 ; Liu Deyao ; You Jinkua ; Chu Wei ; Yang Yong ; Lin Zugeng
刊名	http://electrochem.xmu.edu.cn/CN/abstract/abstract9403.shtml
	1999-08-28
关键词	锂离子电池,锂锰氧化物,钡镁锰矿,钠水锰矿,水羟锰矿 Lithium ion batteries Lithium manganese oxides Todorokite Birnessite Vernadite
英文摘要	利用ＸＲＤ、ＩＣＰ、ＴＧＡ、ＤＴＡ及恒流充放电等方法研究分析了一种特殊天然结构ＭｎＯ２（ＮＭＤ）材料的结构、组成以及电化学嵌锂特性．ＸＲＤ分析表明，该样品材料是由钠水锰矿以及水羟锰矿复合结构组成的ＭｎＯ２纳米纤维．充放电循环结果显示，其前期循环容量可高达１５０ｍＡｈ／ｇ左右，但性能尚不够稳定．本文采用一种水热法高压嵌锂处理，可将ＮＭＤ样品转变为具有３ ×３大隧道结构的钡镁锰矿（Ｔｏｄｏｒｏｋｉｔｅ）型锂锰氧化物，既增强了Ｌｉ＋嵌入隧道或层间结构的循环稳定性．并显著提高锂锰氧化物电极材料性能的稳定性，以充放电电流密度为０．８ｍＡ／ｃｍ２，经过１８０次循环后其比容量仍具有１１０ｍＡｈ／ｇ．该类大隧道结构锂锰氧化物可作为一种３Ｖ的锂离子电极材料．; In this paper, Todorokite manganese oxides containing Li + with large tunnel structure(sample M5) have been synthesized by hydrothermal methods from natural manganese oxide nano fiber (sample M4). The structure and composition of the samples were characterized and analyzed by XRD, ICP, TGA and DTA. Its electrochemical behavior as a cathode materials for rechargeable lithium ion insertion were studied by galvanostatic charge/discharge measurements. XRD results show that the sample M4 is mainly composed of Birnessite and Vernadite structure. Although the sample M4 shows a high initial capacity of approximately 150 mAh/g, its performances decrease gradually over 30 cycles. It is found that the materials have highly reversible charge/discharge cycling performances after being converted into Todorokite lithium manganese oxide(sample M5). This sample exhibit a single reduction step centered at Ca. 2.8 V and its discharge capacity maintains about 110 mAh/g after 180 cycles at current density of 0.8 mA/cm 2. The novel lithium manganese oxide with a large tunnel structure can be used as 3V cathode material of lithium ion batteries.; 作者联系地址：厦门大学固体表面物理化学国家重点实验室!厦门大学物理化学研究所化学系厦门361005,厦门大学固体表面物理化学国家重点实验室!厦门大学物理化学研究所化学系厦门361005,厦门大学固体表面物理化学国家重点实验室!厦门大学物理化学研究所化学系厦门361005,厦门大学固体表面物理; Author's Address: State Key Lab. for Phys. Chem. of Solid Surf., Inst. of Phys. Chem., Dept. of Chem., Xiamen Univ., Xiamen, 361005
语种	中文
出版者	厦门大学《电化学》编辑部
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/57442]
专题	1999年第5卷
推荐引用方式 GB/T 7714	刘德尧,尤金跨,储炜,等. 锂离子电池锂锰氧化物高压嵌锂材料的结构和电化学性能研究, Structural and Electrochemical Studies on Lithium Manganese Oxide Containing Li + Prepared by Hydrothermal Method for Lithium Ion Batteries[J]. http://electrochem.xmu.edu.cn/CN/abstract/abstract9403.shtml,1999.
APA	刘德尧.,尤金跨.,储炜.,杨勇.,林祖赓.,...&Lin Zugeng.(1999).锂离子电池锂锰氧化物高压嵌锂材料的结构和电化学性能研究.http://electrochem.xmu.edu.cn/CN/abstract/abstract9403.shtml.
MLA	刘德尧,et al."锂离子电池锂锰氧化物高压嵌锂材料的结构和电化学性能研究".http://electrochem.xmu.edu.cn/CN/abstract/abstract9403.shtml (1999).