Print Email Facebook Twitter High-Density Microporous Li4Ti5O12 Microbars with Superior Rate Performance for Lithium-Ion Batteries Title High-Density Microporous Li4Ti5O12 Microbars with Superior Rate Performance for Lithium-Ion Batteries Author Tang, Linkai (Tsinghua University) He, Yan Bing (Tsinghua University) Wang, Chao (Tsinghua University) Wang, Shuan (Tsinghua University) Wagemaker, M. (TU Delft RST/Fundamental Aspects of Materials and Energy) Li, Baohua (Tsinghua University) Yang, Quan Hong (Tsinghua University) Kang, Feiyu (Tsinghua University) Date 2017-05-01 Abstract Nanosized Li4Ti5O12 (LTO) materials enabling high rate performance suffer from a large specific surface area and low tap density lowering the cycle life and practical energy density. Microsized LTO materials have high density which generally compromises their rate capability. Aiming at combining the favorable nano and micro size properties, a facile method to synthesize LTO microbars with micropores created by ammonium bicarbonate (NH4HCO3) as a template is presented. The compact LTO microbars are in situ grown by spinel LTO nanocrystals. The as-prepared LTO microbars have a very small specific surface area (6.11 m2 g−1) combined with a high ionic conductivity (5.53 × 10−12 cm−2 s−1) and large tap densities (1.20 g cm−3), responsible for their exceptionally stable long-term cyclic performance and superior rate properties. The specific capacity reaches 141.0 and 129.3 mAh g−1 at the current rate of 10 and 30 C, respectively. The capacity retention is as high as 94.0% and 83.3% after 500 and 1000 cycles at 10 C. This work demonstrates that, in situ creating micropores in microsized LTO using NH4HCO3 not only facilitates a high LTO tap density, to enhance the volumetric energy density, but also provides abundant Li-ion transportation channels enabling high rate performance. Subject high tap densitiesLi-ion batterieslithium titanatemicroporous microbarsNHHCO templates To reference this document use: http://resolver.tudelft.nl/uuid:cf0113e3-b540-45d1-9968-f358a0224e1c DOI https://doi.org/10.1002/advs.201600311 ISSN 1936-6612 Source Advanced Science Letters, 4 (5) Part of collection Institutional Repository Document type journal article Rights © 2017 Linkai Tang, Yan Bing He, Chao Wang, Shuan Wang, M. Wagemaker, Baohua Li, Quan Hong Yang, Feiyu Kang Files PDF Tang_et_al_2017_Advanced_ ... cience.pdf 3.24 MB Close viewer /islandora/object/uuid:cf0113e3-b540-45d1-9968-f358a0224e1c/datastream/OBJ/view