A New Strategy to Effectively Suppress the Initial Capacity Fading of Iron Oxides by Reacting with LiBH4

标题

A New Strategy to Effectively Suppress the Initial Capacity Fading of Iron Oxides by Reacting with LiBH4

作者

作者:Cao, Y (Cao, Yun)^[1,2 ]; Yang, YX (Yang, Yaxiong)^[1,2 ]; Ren, ZH (Ren, Zhuanghe)^[1,2 ]; Jian, N (Jian, Ni)^[1,2 ]; Gao, MX (Gao, Mingxia)^[1,2 ]; Wu, YJ (Wu, Yongjun)^[1,2 ]; Zhu, M (Zhu, Min)^[3 ]; Pan, F (Pan, Feng)^[4 ]; Liu, YF (Liu, Yongfeng)^[1,2,5 ]; Pan, HG (Pan, Hongge)^[1,2 ]

期刊信息

摘要

In this work, a new facile and scalable strategy to effectively suppress the initial capacity fading of iron oxides is demonstrated by reacting with lithium borohydride (LiBH4) to form a B-containing nanocomposite. Multielement, multiphase B-containing iron oxide nanocomposites are successfully prepared by ball-milling Fe2O3 with LiBH4, followed by a thermochemical reaction at 25-350 degrees C. The resulting products exhibit a remarkably superior electrochemical performance as anode materials for Li-ion batteries (LIBs), including a high reversible capacity, good rate capability, and long cycling durability. When cycling is conducted at 100 mA g(-1), the sample prepared from Fe2O3-0.2LiBH(4) delivers an initial discharge capacity of 1387 mAh g(-1). After 200 cycles, the reversible capacity remains at 1148 mAh g(-1), which is significantly higher than that of pristine Fe2O3 (525 mAh g-1) and Fe3O4 (552 mAh g-1). At 2000 mA g(-1), a reversible capacity as high as 660 mAh g(-1) is obtained for the B-containing nanocomposite. The remarkably improved electrochemical lithium storage performance can mainly be attributed to the enhanced surface reactivity, increased Li+ ion diffusivity, stabilized solid-electrolyte interphase (SEI) film, and depressed particle pulverization and fracture, as measured by a series of compositional, structural, and electrochemical techniques.

关键词

KeyWords Plus:LITHIUM-ION BATTERIES; ALPHA-FE2O3 HOLLOW SPHERES; ELECTROCHEMICAL PERFORMANCE; NEGATIVE-ELECTRODE; ANODE MATERIAL; METAL-OXIDES; STORAGE CAPABILITY; GROWTH-MECHANISM; WATER-TREATMENT; GRAPHENE OXIDE

作者信息

作者信息

通讯作者地址:Liu, YF (通讯作者)

Zhejiang Univ, State Key Lab Silicon Mat, Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Hangzhou 310027, Zhejiang, Peoples R China.   增强组织信息的名称     Zhejiang University

通讯作者地址:Liu, YF (通讯作者)

Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China.   增强组织信息的名称     Zhejiang University

通讯作者地址:Liu, YF (通讯作者)

Nankai Univ, Minist Educ, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China.   增强组织信息的名称     Nankai University

地址:

	[ 1 ] Zhejiang Univ, State Key Lab Silicon Mat, Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Hangzhou 310027, Zhejiang, Peoples R China   增强组织信息的名称     Zhejiang University
	[ 2 ] Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China   增强组织信息的名称     Zhejiang University
	[ 3 ] South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology
	[ 4 ] Peking Univ, Shenzhen Grad Sch, Sch Adv Mat, Shenzhen 518055, Peoples R China   增强组织信息的名称     University Town of Shenzhen     Peking University
	[ 5 ] Nankai Univ, Minist Educ, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China   增强组织信息的名称     Nankai University

电子邮件地址:mselyf@zju.edu.cn

出版商

WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY

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