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Polymer-templated mesoporous lithium titanate microspheres for high-performance lithium batteries.

ABSTRACT: The spinel Li₄Ti₅O₁₂ (LTO) is a promising lithium ion battery anode material with the potential to supplement graphite as an industry standard, but its low electrical conductivity and Li-ion diffusivity need to be overcome. Here, mesoporous LTO microspheres with carbon-coatings were formed by phase separation of a homopolymer from microphase-separated block copolymers of varying molar masses containing sol-gel precursors. Upon heating the composite underwent a sol-gel condensation reaction followed by the eventual pyrolysis of the polymer templates. The optimised mesoporous LTO microspheres demonstrated an excellent electrochemical performance with an excellent specific discharge capacity of 164 mA h g^-1, 95% of which was retained after 1000 cycles at a C-rate of 10.

SUBMITTER: Nguyen MT

PROVIDER: S-EPMC8724910 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature

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Polymer-templated mesoporous lithium titanate microspheres for high-performance lithium batteries.

Nguyen Minh Tri MT Sutton Preston P Palumbo Andrea A Fischer Michael G MG Hua Xiao X Gunkel Ilja I Steiner Ullrich U

Materials advances 20211102 1

The spinel Li4Ti5O12 (LTO) is a promising lithium ion battery anode material with the potential to supplement graphite as an industry standard, but its low electrical conductivity and Li-ion diffusivity need to be overcome. Here, mesoporous LTO microspheres with carbon-coatings were formed by phase separation of a homopolymer from microphase-separated block copolymers of varying molar masses containing sol-gel precursors. Upon heating the composite underwent a so ...[more]

PMID: 35128417

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