Electrochemical and electron microscopic characterization of thin-film LiCoO2 cathodes under high-voltage cycling conditions

Young Il Jang; Nancy J. Dudney; Douglas A. Blom; Lawrence F. Allard

doi:10.1016/S0378-7753(03)00160-5

Electrochemical and electron microscopic characterization of thin-film LiCoO₂ cathodes under high-voltage cycling conditions

Young Il Jang, Nancy J. Dudney, Douglas A. Blom, Lawrence F. Allard

Nuclear Energy Materials Microanalysis

Research output: Contribution to journal › Conference article › peer-review

32 Scopus citations

Abstract

Thin-film LiCoO₂ batteries using the Lipon electrolyte exhibit excellent cycleability up to 4.4 V. With the enhanced voltage limit for repeatable cycling, the thin-film cathode delivers a specific capacity of 170 mAh/g, which is 22% higher than that for previous LiCoO₂ cathodes cycled to 4.2 V. No evidence of grain fracture was detected by transmission electron microscopy (TEM) in the cathode layer after cycling to 4.4 V. When cycled to >4.4 V, capacity fades and cell resistance increases more rapidly, attributed to the onset of a phase transition at >4.4 V. Fracture of grains was observed by TEM in the cathode layer after cycling to 5 V. Nanocrystalline films show better cycleability to 5 V than films with a larger grain size.

Original language	English
Pages (from-to)	295-299
Number of pages	5
Journal	Journal of Power Sources
Volume	119-121
DOIs	https://doi.org/10.1016/S0378-7753(03)00160-5
State	Published - Jun 1 2003
Event	Selected Papers Presented at the 11th IMLB - Monterey, CA, United States Duration: Jun 22 2002 → Jun 28 2002

Funding

Y.-I. Jang acknowledges a Eugene P. Wigner fellowship from the Oak Ridge National Laboratory. This research was sponsored by the US Department of Energy’s Division of Materials Sciences and Division of Chemical Sciences under contract DE-AC05-00OR22725 with the Oak Ridge National Laboratory, managed by UT-Battelle, LLC.

Keywords

Lipon
Lithium cobalt oxide
Nanocrystalline cathode
Thin-film batteries
Transmission electron microscopy

Access to Document

10.1016/S0378-7753(03)00160-5

Cite this

@article{8a4a04e1af144a3eb6f250878a9bde87,

title = "Electrochemical and electron microscopic characterization of thin-film LiCoO2 cathodes under high-voltage cycling conditions",

abstract = "Thin-film LiCoO2 batteries using the Lipon electrolyte exhibit excellent cycleability up to 4.4 V. With the enhanced voltage limit for repeatable cycling, the thin-film cathode delivers a specific capacity of 170 mAh/g, which is 22% higher than that for previous LiCoO2 cathodes cycled to 4.2 V. No evidence of grain fracture was detected by transmission electron microscopy (TEM) in the cathode layer after cycling to 4.4 V. When cycled to >4.4 V, capacity fades and cell resistance increases more rapidly, attributed to the onset of a phase transition at >4.4 V. Fracture of grains was observed by TEM in the cathode layer after cycling to 5 V. Nanocrystalline films show better cycleability to 5 V than films with a larger grain size.",

keywords = "Lipon, Lithium cobalt oxide, Nanocrystalline cathode, Thin-film batteries, Transmission electron microscopy",

author = "Jang, {Young Il} and Dudney, {Nancy J.} and Blom, {Douglas A.} and Allard, {Lawrence F.}",

year = "2003",

month = jun,

day = "1",

doi = "10.1016/S0378-7753(03)00160-5",

language = "English",

volume = "119-121",

pages = "295--299",

journal = "Journal of Power Sources",

issn = "0378-7753",

publisher = "Elsevier",

note = "Selected Papers Presented at the 11th IMLB ; Conference date: 22-06-2002 Through 28-06-2002",

}

TY - JOUR

T1 - Electrochemical and electron microscopic characterization of thin-film LiCoO2 cathodes under high-voltage cycling conditions

AU - Jang, Young Il

AU - Dudney, Nancy J.

AU - Blom, Douglas A.

AU - Allard, Lawrence F.

PY - 2003/6/1

Y1 - 2003/6/1

N2 - Thin-film LiCoO2 batteries using the Lipon electrolyte exhibit excellent cycleability up to 4.4 V. With the enhanced voltage limit for repeatable cycling, the thin-film cathode delivers a specific capacity of 170 mAh/g, which is 22% higher than that for previous LiCoO2 cathodes cycled to 4.2 V. No evidence of grain fracture was detected by transmission electron microscopy (TEM) in the cathode layer after cycling to 4.4 V. When cycled to >4.4 V, capacity fades and cell resistance increases more rapidly, attributed to the onset of a phase transition at >4.4 V. Fracture of grains was observed by TEM in the cathode layer after cycling to 5 V. Nanocrystalline films show better cycleability to 5 V than films with a larger grain size.

AB - Thin-film LiCoO2 batteries using the Lipon electrolyte exhibit excellent cycleability up to 4.4 V. With the enhanced voltage limit for repeatable cycling, the thin-film cathode delivers a specific capacity of 170 mAh/g, which is 22% higher than that for previous LiCoO2 cathodes cycled to 4.2 V. No evidence of grain fracture was detected by transmission electron microscopy (TEM) in the cathode layer after cycling to 4.4 V. When cycled to >4.4 V, capacity fades and cell resistance increases more rapidly, attributed to the onset of a phase transition at >4.4 V. Fracture of grains was observed by TEM in the cathode layer after cycling to 5 V. Nanocrystalline films show better cycleability to 5 V than films with a larger grain size.

KW - Lipon

KW - Lithium cobalt oxide

KW - Nanocrystalline cathode

KW - Thin-film batteries

KW - Transmission electron microscopy

UR - http://www.scopus.com/inward/record.url?scp=0038408587&partnerID=8YFLogxK

U2 - 10.1016/S0378-7753(03)00160-5

DO - 10.1016/S0378-7753(03)00160-5

M3 - Conference article

AN - SCOPUS:0038408587

SN - 0378-7753

VL - 119-121

SP - 295

EP - 299

JO - Journal of Power Sources

JF - Journal of Power Sources

T2 - Selected Papers Presented at the 11th IMLB

Y2 - 22 June 2002 through 28 June 2002

ER -