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Self-Templated Formation of P2-type K0.6CoO2 Microspheres for High Reversible Potassium-Ion Batteries.
. 2018 02 14; 18(2):1522-1529.

Abstract

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. 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+Show Affiliations

Department of Chemical and Biomolecular Engineering and ‡Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States.Department of Chemical and Biomolecular Engineering and ‡Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States.Department of Chemical and Biomolecular Engineering and ‡Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States.Department of Chemical and Biomolecular Engineering and ‡Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States.Department of Chemical and Biomolecular Engineering and ‡Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States.Department of Chemical and Biomolecular Engineering and ‡Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States.Department of Chemical and Biomolecular Engineering and ‡Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States.Department of Chemical and Biomolecular Engineering and ‡Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States.Department of Chemical and Biomolecular Engineering and ‡Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States.

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

29293355

Citation

Deng, Tao, et al. "Self-Templated Formation of P2-type K0.6CoO2 Microspheres for High Reversible Potassium-Ion Batteries." Nano Letters, vol. 18, no. 2, 2018, pp. 1522-1529.
Deng T, Fan X, Luo C, et al. Self-Templated Formation of P2-type K0.6CoO2 Microspheres for High Reversible Potassium-Ion Batteries. Nano Lett. 2018;18(2):1522-1529.
Deng, T., Fan, X., Luo, C., Chen, J., Chen, L., Hou, S., Eidson, N., Zhou, X., & Wang, C. (2018). Self-Templated Formation of P2-type K0.6CoO2 Microspheres for High Reversible Potassium-Ion Batteries. Nano Letters, 18(2), 1522-1529. https://doi.org/10.1021/acs.nanolett.7b05324
Deng T, et al. Self-Templated Formation of P2-type K0.6CoO2 Microspheres for High Reversible Potassium-Ion Batteries. Nano Lett. 2018 02 14;18(2):1522-1529. PubMed PMID: 29293355.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Self-Templated Formation of P2-type K0.6CoO2 Microspheres for High Reversible Potassium-Ion Batteries. AU - Deng,Tao, AU - Fan,Xiulin, AU - Luo,Chao, AU - Chen,Ji, AU - Chen,Long, AU - Hou,Singyuk, AU - Eidson,Nico, AU - Zhou,Xiuquan, AU - Wang,Chunsheng, Y1 - 2018/01/04/ PY - 2018/1/3/pubmed PY - 2018/1/3/medline PY - 2018/1/3/entrez KW - Cathode material KW - K0.6CoO2 KW - high reversibility KW - layered metal oxides KW - potassium-ion battery SP - 1522 EP - 1529 JF - Nano letters JO - Nano Lett. VL - 18 IS - 2 N2 - 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. 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. SN - 1530-6992 UR - https://www.unboundmedicine.com/medline/citation/29293355/Self_Templated_Formation_of_P2_type_K0_6CoO2_Microspheres_for_High_Reversible_Potassium_Ion_Batteries_ L2 - https://doi.org/10.1021/acs.nanolett.7b05324 DB - PRIME DP - Unbound Medicine ER -
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