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Metallic Graphene-Like VSe2 Ultrathin Nanosheets: Superior Potassium-Ion Storage and Their Working Mechanism.
Adv Mater. 2018 Jul; 30(27):e1800036.AM

Abstract

Potassium-ion batteries (KIBs) are receiving increasing interest in grid-scale energy storage owing to the earth abundant and low cost of potassium resources. However, their development still stays at the infancy stage due to the lack of suitable electrode materials with reversible depotassiation/potassiation behavior, resulting in poor rate performance, low capacity, and cycling stability. Herein, the first example of synthesizing single-crystalline metallic graphene-like VSe2 nanosheets for greatly boosting the performance of KIBs in term of capacity, rate capability, and cycling stability is reported. Benefiting from the unique 2D nanostructure, high electron/K+ -ion conductivity, and outstanding pseudocapacitance effects, ultrathin VSe2 nanosheets show a very high reversible capacity of 366 mAh g-1 at 100 mA g-1 , a high rate capability of 169 mAh g-1 at 2000 mA g-1 , and a very low decay of 0.025% per cycle over 500 cycles, which are the best in all the reported anode materials in KIBs. The first-principles calculations reveal that VSe2 nanosheets have large adsorption energy and low diffusion barriers for the intercalation of K+ -ion. Ex situ X-ray diffraction analysis indicates that VSe2 nanosheets undertake a reversible phase evolution by initially proceeding with the K+ -ion insertion within VSe2 layers, followed by the conversion reaction mechanism.

Authors+Show Affiliations

Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China. State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials and Chemical Engineering, Hainan University, Haikou, 570228, China.Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China.Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China.Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China.State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials and Chemical Engineering, Hainan University, Haikou, 570228, China.Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China.Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China.Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China.Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China.State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials and Chemical Engineering, Hainan University, Haikou, 570228, China.Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China. BIC-ESAT, College of Engineering, Peking University, Beijing, 100871, China. Key Lab of Theory and Technology for Advanced Battery Materials, College of Engineering, Peking University, Beijing, 100871, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29766574

Citation

Yang, Chao, et al. "Metallic Graphene-Like VSe2 Ultrathin Nanosheets: Superior Potassium-Ion Storage and Their Working Mechanism." Advanced Materials (Deerfield Beach, Fla.), vol. 30, no. 27, 2018, pp. e1800036.
Yang C, Feng J, Lv F, et al. Metallic Graphene-Like VSe2 Ultrathin Nanosheets: Superior Potassium-Ion Storage and Their Working Mechanism. Adv Mater Weinheim. 2018;30(27):e1800036.
Yang, C., Feng, J., Lv, F., Zhou, J., Lin, C., Wang, K., Zhang, Y., Yang, Y., Wang, W., Li, J., & Guo, S. (2018). Metallic Graphene-Like VSe2 Ultrathin Nanosheets: Superior Potassium-Ion Storage and Their Working Mechanism. Advanced Materials (Deerfield Beach, Fla.), 30(27), e1800036. https://doi.org/10.1002/adma.201800036
Yang C, et al. Metallic Graphene-Like VSe2 Ultrathin Nanosheets: Superior Potassium-Ion Storage and Their Working Mechanism. Adv Mater Weinheim. 2018;30(27):e1800036. PubMed PMID: 29766574.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Metallic Graphene-Like VSe2 Ultrathin Nanosheets: Superior Potassium-Ion Storage and Their Working Mechanism. AU - Yang,Chao, AU - Feng,Jianrui, AU - Lv,Fan, AU - Zhou,Jinhui, AU - Lin,Chunfu, AU - Wang,Kai, AU - Zhang,Yelong, AU - Yang,Yong, AU - Wang,Wei, AU - Li,Jianbao, AU - Guo,Shaojun, Y1 - 2018/05/15/ PY - 2018/01/02/received PY - 2018/03/12/revised PY - 2018/5/17/pubmed PY - 2018/5/17/medline PY - 2018/5/17/entrez KW - VSe2 ultrathin nanosheet KW - anode materials KW - electrochemical property KW - high capacity KW - potassium-ion battery SP - e1800036 EP - e1800036 JF - Advanced materials (Deerfield Beach, Fla.) JO - Adv. Mater. Weinheim VL - 30 IS - 27 N2 - Potassium-ion batteries (KIBs) are receiving increasing interest in grid-scale energy storage owing to the earth abundant and low cost of potassium resources. However, their development still stays at the infancy stage due to the lack of suitable electrode materials with reversible depotassiation/potassiation behavior, resulting in poor rate performance, low capacity, and cycling stability. Herein, the first example of synthesizing single-crystalline metallic graphene-like VSe2 nanosheets for greatly boosting the performance of KIBs in term of capacity, rate capability, and cycling stability is reported. Benefiting from the unique 2D nanostructure, high electron/K+ -ion conductivity, and outstanding pseudocapacitance effects, ultrathin VSe2 nanosheets show a very high reversible capacity of 366 mAh g-1 at 100 mA g-1 , a high rate capability of 169 mAh g-1 at 2000 mA g-1 , and a very low decay of 0.025% per cycle over 500 cycles, which are the best in all the reported anode materials in KIBs. The first-principles calculations reveal that VSe2 nanosheets have large adsorption energy and low diffusion barriers for the intercalation of K+ -ion. Ex situ X-ray diffraction analysis indicates that VSe2 nanosheets undertake a reversible phase evolution by initially proceeding with the K+ -ion insertion within VSe2 layers, followed by the conversion reaction mechanism. SN - 1521-4095 UR - https://www.unboundmedicine.com/medline/citation/29766574/Metallic_Graphene_Like_VSe2_Ultrathin_Nanosheets:_Superior_Potassium_Ion_Storage_and_Their_Working_Mechanism_ L2 - https://doi.org/10.1002/adma.201800036 DB - PRIME DP - Unbound Medicine ER -
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