Enhanced low temperature performances of expanded commercial mesocarbon microbeads (MCMB) as lithium ion battery anodes

Guangyu Zhao; Zhaohuan Wei; Naiqing Zhang; Kening Sun

doi:10.1016/j.matlet.2012.07.066

Enhanced low temperature performances of expanded commercial mesocarbon microbeads (MCMB) as lithium ion battery anodes

Guangyu Zhao, Zhaohuan Wei, Naiqing Zhang, Kening Sun^*

^*Corresponding author for this work

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

Expanded mesocarbon microbeads (EMCMB) are prepared by oxidizing pristine mesocarbon microbeads (MCMB). The d ₀₀₂ value calculated from X-ray diffraction results shows that the average interlayer distance of MCMB increases after oxidizing modification. The increased interlayer distance facilitates Li insertion kinetics, which causes an extraordinarily improved capacity of EMCMB (100 mAh g ^-1) at -40 °C, compared with pristine MCMB (almost no capacity at -40 °C). The facilitated Li insertion kinetics is analyzed by electrochemical impedance spectroscopy (EIS). EIS results demonstrate that both charge-transfer resistance and Li diffusion resistance of the EMCMB decrease obviously. The diffusion coefficients of Li in MCMB and EMCMB at -40 °C calculated from EIS are 2.46×10 ^-17 cm ² s ^-1 and 1×10 ^-15 cm ² s ^-1, respectively.

Original language	English
Pages (from-to)	243-246
Number of pages	4
Journal	Materials Letters
Volume	89
DOIs	https://doi.org/10.1016/j.matlet.2012.07.066
Publication status	Published - 15 Dec 2012
Externally published	Yes

Keywords

Carbon materials
Energy storage and conversion
X-ray techniques

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.matlet.2012.07.066

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title = "Enhanced low temperature performances of expanded commercial mesocarbon microbeads (MCMB) as lithium ion battery anodes",

abstract = "Expanded mesocarbon microbeads (EMCMB) are prepared by oxidizing pristine mesocarbon microbeads (MCMB). The d 002 value calculated from X-ray diffraction results shows that the average interlayer distance of MCMB increases after oxidizing modification. The increased interlayer distance facilitates Li insertion kinetics, which causes an extraordinarily improved capacity of EMCMB (100 mAh g -1) at -40 °C, compared with pristine MCMB (almost no capacity at -40 °C). The facilitated Li insertion kinetics is analyzed by electrochemical impedance spectroscopy (EIS). EIS results demonstrate that both charge-transfer resistance and Li diffusion resistance of the EMCMB decrease obviously. The diffusion coefficients of Li in MCMB and EMCMB at -40 °C calculated from EIS are 2.46×10 -17 cm 2 s -1 and 1×10 -15 cm 2 s -1, respectively.",

keywords = "Carbon materials, Energy storage and conversion, X-ray techniques",

author = "Guangyu Zhao and Zhaohuan Wei and Naiqing Zhang and Kening Sun",

year = "2012",

month = dec,

day = "15",

doi = "10.1016/j.matlet.2012.07.066",

language = "English",

volume = "89",

pages = "243--246",

journal = "Materials Letters",

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TY - JOUR

T1 - Enhanced low temperature performances of expanded commercial mesocarbon microbeads (MCMB) as lithium ion battery anodes

AU - Zhao, Guangyu

AU - Wei, Zhaohuan

AU - Zhang, Naiqing

AU - Sun, Kening

PY - 2012/12/15

Y1 - 2012/12/15

N2 - Expanded mesocarbon microbeads (EMCMB) are prepared by oxidizing pristine mesocarbon microbeads (MCMB). The d 002 value calculated from X-ray diffraction results shows that the average interlayer distance of MCMB increases after oxidizing modification. The increased interlayer distance facilitates Li insertion kinetics, which causes an extraordinarily improved capacity of EMCMB (100 mAh g -1) at -40 °C, compared with pristine MCMB (almost no capacity at -40 °C). The facilitated Li insertion kinetics is analyzed by electrochemical impedance spectroscopy (EIS). EIS results demonstrate that both charge-transfer resistance and Li diffusion resistance of the EMCMB decrease obviously. The diffusion coefficients of Li in MCMB and EMCMB at -40 °C calculated from EIS are 2.46×10 -17 cm 2 s -1 and 1×10 -15 cm 2 s -1, respectively.

AB - Expanded mesocarbon microbeads (EMCMB) are prepared by oxidizing pristine mesocarbon microbeads (MCMB). The d 002 value calculated from X-ray diffraction results shows that the average interlayer distance of MCMB increases after oxidizing modification. The increased interlayer distance facilitates Li insertion kinetics, which causes an extraordinarily improved capacity of EMCMB (100 mAh g -1) at -40 °C, compared with pristine MCMB (almost no capacity at -40 °C). The facilitated Li insertion kinetics is analyzed by electrochemical impedance spectroscopy (EIS). EIS results demonstrate that both charge-transfer resistance and Li diffusion resistance of the EMCMB decrease obviously. The diffusion coefficients of Li in MCMB and EMCMB at -40 °C calculated from EIS are 2.46×10 -17 cm 2 s -1 and 1×10 -15 cm 2 s -1, respectively.

KW - Carbon materials

KW - Energy storage and conversion

KW - X-ray techniques

UR - http://www.scopus.com/inward/record.url?scp=84867515720&partnerID=8YFLogxK

U2 - 10.1016/j.matlet.2012.07.066

DO - 10.1016/j.matlet.2012.07.066

M3 - Article

AN - SCOPUS:84867515720

SN - 0167-577X

VL - 89

SP - 243

EP - 246

JO - Materials Letters

JF - Materials Letters

ER -

Enhanced low temperature performances of expanded commercial mesocarbon microbeads (MCMB) as lithium ion battery anodes

Abstract

Keywords

UN SDGs

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