Electrochemical characteristics of xLi2MnO3-(1-x) Li(Mn0.375Ni0.375Co0.25)O2 (0.0 ≤ x ≤ 1.0) composite cathodes: Effect of particle and Li2MnO 3 domain size

C. Ghanty; R. N. Basu; S. B. Majumder

doi:10.1016/j.electacta.2014.03.174

Electrochemical characteristics of xLi₂MnO₃-(1-x) Li(Mn_0.375Ni_0.375Co_0.25)O₂ (0.0 ≤ x ≤ 1.0) composite cathodes: Effect of particle and Li₂MnO ₃ domain size

C. Ghanty, R. N. Basu, S. B. Majumder

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

18 Scopus citations

Abstract

We have investigated the electrochemical characteristics of a series of high capacity xLi₂MnO₃-(1-x)Li(Mn_0.375Ni _0.375Co_0.25)O₂ (0.0 ≤ x ≤ 1.0) integrated cathodes. Among several interrelated factors (viz. nominal molar content of Li₂MnO₃ and Li(Mn_0.375Ni_0.375Co _0.25)O₂ constituents, activation of Li₂MnO ₃ component, crystallinity of the particles etc) an optimum particle size is argued to be most critical to yield better electrochemical performance of the synthesized cathodes. Through X-ray diffraction in conjunction with micro-Raman spectroscopy and high resolution transmission microscopy analyses we have demonstrated that with the increase of nominal Li₂MnO ₃ contents, the size of the ordered nano-domains (inside the active matrix) and the average size of the composite cathode particles increase systematically. The size of the ordered nano-domains, cathode particles, and electrochemically triggered layer to spinel phase transformation influence the electrochemical characteristics of these cathodes. The average particle size of 0.5Li₂MnO₃- 0.5Li(Mn_0.375Ni _0.375Co_0.25)O₂ particles have been systematically varied by tuning the calcination time temperature combination. The optimized cathode yields a discharge capacity ∼ 300 mAhg^-1 with capacity retention about 96% after 50 charge-discharge cycles at 10 mAg^-1 rate. The cathode with optimal particle size also exhibits a decent rate capability with room temperature discharge capacity ∼ 200 mAhg^-1 at 300 mAg^-1 rate.

Original language	English
Pages (from-to)	472-482
Number of pages	11
Journal	Electrochimica Acta
Volume	132
DOIs	https://doi.org/10.1016/j.electacta.2014.03.174
State	Published - 20 Jun 2014
Externally published	Yes

Bibliographical note

Funding Information:
One of the authors, Mr. C. Ghanty, would like to acknowledge CSIR, Govt. of India for providing him a Research Fellowship under CSIR-NET scheme.

Funding

One of the authors, Mr. C. Ghanty, would like to acknowledge CSIR, Govt. of India for providing him a Research Fellowship under CSIR-NET scheme.

Funders	Funder number
CSIR-NET

Keywords

Lithium-ion battery
Raman spectroscopy
electrochemical properties
integrated cathode materials
particle size

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

Access to Document

10.1016/j.electacta.2014.03.174

Cite this

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title = "Electrochemical characteristics of xLi2MnO3-(1-x) Li(Mn0.375Ni0.375Co0.25)O2 (0.0 ≤ x ≤ 1.0) composite cathodes: Effect of particle and Li2MnO 3 domain size",

abstract = "We have investigated the electrochemical characteristics of a series of high capacity xLi2MnO3-(1-x)Li(Mn0.375Ni 0.375Co0.25)O2 (0.0 ≤ x ≤ 1.0) integrated cathodes. Among several interrelated factors (viz. nominal molar content of Li2MnO3 and Li(Mn0.375Ni0.375Co 0.25)O2 constituents, activation of Li2MnO 3 component, crystallinity of the particles etc) an optimum particle size is argued to be most critical to yield better electrochemical performance of the synthesized cathodes. Through X-ray diffraction in conjunction with micro-Raman spectroscopy and high resolution transmission microscopy analyses we have demonstrated that with the increase of nominal Li2MnO 3 contents, the size of the ordered nano-domains (inside the active matrix) and the average size of the composite cathode particles increase systematically. The size of the ordered nano-domains, cathode particles, and electrochemically triggered layer to spinel phase transformation influence the electrochemical characteristics of these cathodes. The average particle size of 0.5Li2MnO3- 0.5Li(Mn0.375Ni 0.375Co0.25)O2 particles have been systematically varied by tuning the calcination time temperature combination. The optimized cathode yields a discharge capacity ∼ 300 mAhg-1 with capacity retention about 96% after 50 charge-discharge cycles at 10 mAg-1 rate. The cathode with optimal particle size also exhibits a decent rate capability with room temperature discharge capacity ∼ 200 mAhg-1 at 300 mAg-1 rate.",

keywords = "Lithium-ion battery, Raman spectroscopy, electrochemical properties, integrated cathode materials, particle size",

author = "C. Ghanty and Basu, {R. N.} and Majumder, {S. B.}",

note = "Funding Information: One of the authors, Mr. C. Ghanty, would like to acknowledge CSIR, Govt. of India for providing him a Research Fellowship under CSIR-NET scheme.",

year = "2014",

month = jun,

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doi = "10.1016/j.electacta.2014.03.174",

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T1 - Electrochemical characteristics of xLi2MnO3-(1-x) Li(Mn0.375Ni0.375Co0.25)O2 (0.0 ≤ x ≤ 1.0) composite cathodes

T2 - Effect of particle and Li2MnO 3 domain size

AU - Ghanty, C.

AU - Basu, R. N.

AU - Majumder, S. B.

N1 - Funding Information: One of the authors, Mr. C. Ghanty, would like to acknowledge CSIR, Govt. of India for providing him a Research Fellowship under CSIR-NET scheme.

PY - 2014/6/20

Y1 - 2014/6/20

N2 - We have investigated the electrochemical characteristics of a series of high capacity xLi2MnO3-(1-x)Li(Mn0.375Ni 0.375Co0.25)O2 (0.0 ≤ x ≤ 1.0) integrated cathodes. Among several interrelated factors (viz. nominal molar content of Li2MnO3 and Li(Mn0.375Ni0.375Co 0.25)O2 constituents, activation of Li2MnO 3 component, crystallinity of the particles etc) an optimum particle size is argued to be most critical to yield better electrochemical performance of the synthesized cathodes. Through X-ray diffraction in conjunction with micro-Raman spectroscopy and high resolution transmission microscopy analyses we have demonstrated that with the increase of nominal Li2MnO 3 contents, the size of the ordered nano-domains (inside the active matrix) and the average size of the composite cathode particles increase systematically. The size of the ordered nano-domains, cathode particles, and electrochemically triggered layer to spinel phase transformation influence the electrochemical characteristics of these cathodes. The average particle size of 0.5Li2MnO3- 0.5Li(Mn0.375Ni 0.375Co0.25)O2 particles have been systematically varied by tuning the calcination time temperature combination. The optimized cathode yields a discharge capacity ∼ 300 mAhg-1 with capacity retention about 96% after 50 charge-discharge cycles at 10 mAg-1 rate. The cathode with optimal particle size also exhibits a decent rate capability with room temperature discharge capacity ∼ 200 mAhg-1 at 300 mAg-1 rate.

AB - We have investigated the electrochemical characteristics of a series of high capacity xLi2MnO3-(1-x)Li(Mn0.375Ni 0.375Co0.25)O2 (0.0 ≤ x ≤ 1.0) integrated cathodes. Among several interrelated factors (viz. nominal molar content of Li2MnO3 and Li(Mn0.375Ni0.375Co 0.25)O2 constituents, activation of Li2MnO 3 component, crystallinity of the particles etc) an optimum particle size is argued to be most critical to yield better electrochemical performance of the synthesized cathodes. Through X-ray diffraction in conjunction with micro-Raman spectroscopy and high resolution transmission microscopy analyses we have demonstrated that with the increase of nominal Li2MnO 3 contents, the size of the ordered nano-domains (inside the active matrix) and the average size of the composite cathode particles increase systematically. The size of the ordered nano-domains, cathode particles, and electrochemically triggered layer to spinel phase transformation influence the electrochemical characteristics of these cathodes. The average particle size of 0.5Li2MnO3- 0.5Li(Mn0.375Ni 0.375Co0.25)O2 particles have been systematically varied by tuning the calcination time temperature combination. The optimized cathode yields a discharge capacity ∼ 300 mAhg-1 with capacity retention about 96% after 50 charge-discharge cycles at 10 mAg-1 rate. The cathode with optimal particle size also exhibits a decent rate capability with room temperature discharge capacity ∼ 200 mAhg-1 at 300 mAg-1 rate.

KW - Lithium-ion battery

KW - Raman spectroscopy

KW - electrochemical properties

KW - integrated cathode materials

KW - particle size

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