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Donut‐Shaped Li 4 Ti 5 O 12 Structures as a High Performance Anode Material for Lithium Ion Batteries
Author(s) -
Haridas Anulekha K.,
Sharma Chandra S.,
Rao Tata N.
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201303894
Subject(s) - anode , lithium (medication) , materials science , lithium titanate , micrometer , electrochemistry , ion , spinel , diffusion , nanotechnology , battery (electricity) , range (aeronautics) , chemical engineering , lithium ion battery , composite material , optics , physics , metallurgy , medicine , power (physics) , engineering , electrode , quantum mechanics , thermodynamics , endocrinology
Lithium titanate (LTO) spinel 3D porous sub‐micrometer donuts synthesized by combined sol‐gel and electrospraying reveal a wall thickness of 200–250 nm with grain sizes in the range of 60–100 nm. Electrochemical testing of sub‐micrometer donuts in half‐cell mode exhibited a reversible specific capacity of 141 mAh/g even after 200 cycles of charging and discharging at 1C rate. The LTO structures with nanograins effectively reduce the Li ion diffusion path length, providing easy charge and discharge with good cyclability.