Self-Templated Formation of P2-type K0.6CoO2 Microspheres for High Reversible Potassium-Ion Batteries
Abstract
We report that layered metal oxides have been widely used as the best cathode materials for commercial lithium-ion batteries and are being intensively explored for sodium-ion batteries. However, their application to potassium-ion batteries (PIBs) is hampered because of the poor cycling stability and low rate capability due to the larger ionic size of K+ than of Li+ or Na+. Herein, a facile self-templated strategy was used to synthesize unique P2-type K0.6CoO2 microspheres that consist of aggregated primary nanoplates as PIB cathodes. The unique K0.6CoO2 microspheres with aggregated structure significantly enhanced the kinetics of the K+ intercalation/deintercation and also minimized the parasitic reactions between the electrolyte and K0.6CoO2. The P2-K0.6CoO2 microspheres demonstrated a high reversible capacity of 82 mAh g–1 at 10 mA g–1, high rate capability of 65 mAh g–1 at 100 mA g–1, and long cycle life (87% capacity retention over 300 cycles). The high reversibility of the P2-K0.6CoO2 full cell paired with a hard carbon anode further demonstrated the feasibility of PIBs. Lastly, this work not only successfully demonstrates exceptional performance of P2-type K0.6CoO2 cathodes and microspheres K0.6CoO2∥hard carbon full cells, but also provides new insights into the exploration of other layered metal oxides for PIBs.
- Authors:
-
- Univ. of Maryland, College Park, MD (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Nanostructures for Electrical Energy Storage (NEES)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1470232
- Grant/Contract Number:
- SC0001160
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Letters
- Additional Journal Information:
- Journal Volume: 18; Journal Issue: 2; Related Information: NEES partners with University of Maryland (lead); University of California, Irvine; University of Florida; Los Alamos National Laboratory; Sandia National Laboratories; Yale University; Journal ID: ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 25 ENERGY STORAGE; bio-inspired; energy storage (including batteries and capacitors); defects; charge transport; synthesis (novel materials); synthesis (self-assembly); synthesis (scalable processing); Cathode material; layered metal oxides; K0.6CoO2; high reversibility; potassium-ion battery
Citation Formats
Deng, Tao, Fan, Xiulin, Luo, Chao, Chen, Ji, Chen, Long, Hou, Singyuk, Eidson, Nico, Zhou, Xiuquan, and Wang, Chunsheng. Self-Templated Formation of P2-type K0.6CoO2 Microspheres for High Reversible Potassium-Ion Batteries. United States: N. p., 2018.
Web. doi:10.1021/acs.nanolett.7b05324.
Deng, Tao, Fan, Xiulin, Luo, Chao, Chen, Ji, Chen, Long, Hou, Singyuk, Eidson, Nico, Zhou, Xiuquan, & Wang, Chunsheng. Self-Templated Formation of P2-type K0.6CoO2 Microspheres for High Reversible Potassium-Ion Batteries. United States. https://doi.org/10.1021/acs.nanolett.7b05324
Deng, Tao, Fan, Xiulin, Luo, Chao, Chen, Ji, Chen, Long, Hou, Singyuk, Eidson, Nico, Zhou, Xiuquan, and Wang, Chunsheng. Tue .
"Self-Templated Formation of P2-type K0.6CoO2 Microspheres for High Reversible Potassium-Ion Batteries". United States. https://doi.org/10.1021/acs.nanolett.7b05324. https://www.osti.gov/servlets/purl/1470232.
@article{osti_1470232,
title = {Self-Templated Formation of P2-type K0.6CoO2 Microspheres for High Reversible Potassium-Ion Batteries},
author = {Deng, Tao and Fan, Xiulin and Luo, Chao and Chen, Ji and Chen, Long and Hou, Singyuk and Eidson, Nico and Zhou, Xiuquan and Wang, Chunsheng},
abstractNote = {We report that layered metal oxides have been widely used as the best cathode materials for commercial lithium-ion batteries and are being intensively explored for sodium-ion batteries. However, their application to potassium-ion batteries (PIBs) is hampered because of the poor cycling stability and low rate capability due to the larger ionic size of K+ than of Li+ or Na+. Herein, a facile self-templated strategy was used to synthesize unique P2-type K0.6CoO2 microspheres that consist of aggregated primary nanoplates as PIB cathodes. The unique K0.6CoO2 microspheres with aggregated structure significantly enhanced the kinetics of the K+ intercalation/deintercation and also minimized the parasitic reactions between the electrolyte and K0.6CoO2. The P2-K0.6CoO2 microspheres demonstrated a high reversible capacity of 82 mAh g–1 at 10 mA g–1, high rate capability of 65 mAh g–1 at 100 mA g–1, and long cycle life (87% capacity retention over 300 cycles). The high reversibility of the P2-K0.6CoO2 full cell paired with a hard carbon anode further demonstrated the feasibility of PIBs. Lastly, this work not only successfully demonstrates exceptional performance of P2-type K0.6CoO2 cathodes and microspheres K0.6CoO2∥hard carbon full cells, but also provides new insights into the exploration of other layered metal oxides for PIBs.},
doi = {10.1021/acs.nanolett.7b05324},
journal = {Nano Letters},
number = 2,
volume = 18,
place = {United States},
year = {Tue Jan 02 00:00:00 EST 2018},
month = {Tue Jan 02 00:00:00 EST 2018}
}
Web of Science
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