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Synergic effect of nanostructuring and excess Mn3+ content in the electrochemical performance of Li4Ti5O12–LiNi0.5Mn1.5O4 Li-ion full-cells

Published online by Cambridge University Press:  11 October 2019

Anulekha K. Haridas Open the ORCID record for Anulekha K. Haridas [Opens in a new window] ,
Adduru Jyothirmayi ,
Chandra S. Sharma Open the ORCID record for Chandra S. Sharma [Opens in a new window]  and
Tata N. Rao
Anulekha K. Haridas
Affiliation:
International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, Telangana, 500005, India; and Creative & Advanced Research Based on Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Sangareddy, Telangana 502285, India
Adduru Jyothirmayi
Affiliation:
International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, Telangana, 500005, India
Chandra S. Sharma*
Affiliation:
Creative & Advanced Research Based on Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Sangareddy, Telangana 502285, India
Tata N. Rao*
Affiliation:
International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, Telangana, 500005, India
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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Abstract

The design of high energy Li-ion batteries (LIBs) by coupling high voltage LiNi0.5Mn1.5O4 (LNMO) cathode and Li4Ti5O12 (LTO) anode ensures effective and safe energy-storage. LTO–LNMO full-cells (FCs) with difference in electrode grain sizes and presence of excess Mn3+ in cathode were studied using micron-sized commercial LTO, nanostructured LTO donuts (LTOd), P4332 LNMO nanopowders, and nanostructured Fd3m LNMO caterpillars (LNMOcplr). Among the studied FCs, LTOd–LNMOcplr was detected with a stable capacity of 69 mA h/g (1C rate), 99% coulombic efficiency, and 87% capacity retention under 200 cycles of continuous charge–discharge studies. The superior electrochemical performance observed in LTOd–LNMOcplr FC was due to the low charge transfer resistance, which is corroborated to the effect of grain sizes and the longer retention of Mn3+ in the electrodes. An effective and simple FC design incorporating both nanostructuring and in situ conductivity in electrode materials would aid in developing future high-performance LIBs.

Keywords

Linanostructureenergy storage
Type
Article
Information
Journal of Materials Research , Volume 35 , Issue 1: Focus Section: Advances in Battery Technology: Material Innovations in Design and Fabrication , 14 January 2020 , pp. 42 - 50
Copyright
Copyright © Materials Research Society 2019 

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Footnotes

c)

Present Address: Department of Chemical and Bio-molecular Engineering, Rice University, Houston, Texas, USA.

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