Time-Dependent in-Situ Neutron Diffraction Investigation of a Li(Co0.16Mn1.84)O4 Cathode

被引：39

作者：

Sharma, Neeraj ^{[1
]}

Reddy, M. V. ^{[2
]}

Du, Guodong ^{[3
]}

Adams, Stefan ^{[4
]}

Chowdari, B. V. R. ^{[2
]}

Guo, Zaiping ^{[3
]}

Peterson, Vanessa K. ^{[1
]}

机构：

[1] Australian Nucl Sci & Technol Org, Bragg Inst, Kirrawee Dc, NSW 2232, Australia

[2] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

[3] Univ Wollongong, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2522, Australia

[4] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117542, Singapore

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 43期

基金：

澳大利亚研究理事会;

关键词：

LITHIUM-ION BATTERY; ELECTRODE MATERIALS; POWDER DIFFRACTOMETER; PERFORMANCE; INSERTION; CELL; TRANSITION; EXTRACTION; LIMN2O4; ANODE;

D O I：

10.1021/jp2026237

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Real-time in-situ neutron diffraction data reveal for the first time that the Li(Co0.16Mn1.84)O-4 cathode undergoes current-free discharge. We find that current-free discharge occurs in a partially charged Li(Co-0.16-Mn-1.84)O-4 cathode during its first charge cycle over a period of 11 h resulting in a 44(2)% expansion of the crystal lattice. The rate of change in the lattice parameter during the current-free discharge process is half the rate and more linear than for an applied-current discharge of-0.5 mA The origins of current-free discharge are discussed along with the implications of nonequilibrium relaxation processes in in-situ neutron and X-ray diffraction studies. We show that the lattice does not return to the predischarge values after either current-applied or current-free discharge, indicating a limited ability for Li reinsertion (capacity loss) in partially charged Li(Co0.16Mn1.84)O-4 batteries.

引用

页码：21473 / 21480

页数：8

共 40 条

[1] Materials' effects on the elevated and room temperature performance of C/LiMn2O4 Li-ion batteries [J].

Amatucci, GG ;

Schmutz, CN ;

Blyr, A ;

Sigala, C ;

Gozdz, AS ;

Larcher, D ;

Tarascon, JM .

JOURNAL OF POWER SOURCES, 1997, 69 (1-2) :11-25

[2]

[Anonymous], 2001, 6196022001 IEC

[3]

[Anonymous], 1992, NEUTRON NEWS, V3, P29, DOI DOI 10.1080/10448639208218770

[4] Design and performance of an electrochemical in-situ cell for high resolution full-pattern X-ray powder diffraction [J].

Baehtz, C ;

Buhrmester, T ;

Bramnik, NN ;

Nikolowski, K ;

Ehrenberg, H .

SOLID STATE IONICS, 2005, 176 (17-18) :1647-1652

[5] Neutron diffraction study of electrochemically delithiated LiMn2O4 spinel [J].

Berg, H ;

Thomas, JO .

SOLID STATE IONICS, 1999, 126 (3-4) :227-234

[6] The LiMn2O4 to λ-MnO2 phase transition studied by in situ neutron diffraction [J].

Berg, H ;

Rundlöv, H ;

Thomas, JO .

SOLID STATE IONICS, 2001, 144 (1-2) :65-69

[7] Neutron diffraction study of stoichiometric spinel Li1+xMn2-xO4 showing octahedral 16c-site Li-occupation [J].

Berg, H ;

Kelder, EM ;

Thomas, JO .

JOURNAL OF MATERIALS CHEMISTRY, 1999, 9 (02) :427-429

[8] A neutron diffraction cell for studying lithium-insertion processes in electrode materials [J].

Bergstrom, O ;

Andersson, AM ;

Edstrom, K ;

Gustafsson, T .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1998, 31 :823-825

[9] NEUTRON POWDER-DIFFRACTION STUDIES OF LITHIUM, SODIUM, AND POTASSIUM METAL [J].

BERLINER, R ;

FAJEN, O ;

SMITH, HG ;

HITTERMAN, RL .

PHYSICAL REVIEW B, 1989, 40 (18) :12086-12097

[10] Self-discharge of LiMn2O4/C Li-ion cells in their discharged state -: Understanding by means of three-electrode measurements [J].

Blyr, A ;

Sigala, C ;

Amatucci, G ;

Guyomard, D ;

Chabre, Y ;

Tarascon, JM .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1998, 145 (01) :194-209

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