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https://doi.org/10.1007/s12274-021-3606-6

N, P-codoped graphene supported few-layered MoS2 as a long-life and high-rate anode materials for potassium-ion storage

Guangyao Ma1, Yanli Zhou2 (✉), Yingying Wang3, Zhenyu Feng1, and Jian Yang1,4 (✉)

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1 Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
2 School of Environmental and Materials Engineering, Yantai University, Yantai 264005, China
3 Shandong Vocational College of Light Industry, Zibo 255300, China
4 Shenzhen Research Institute of Shandong University, Shenzhen 518000, China

Keywords: MoS2, heteroatom doping, electrochemical reactions, anode materials, potassium-ion batteries
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  • Abstract
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Layer-structured MoS2 is regarded as a promising anode material for potassium ion batteries. Herein, MoS2 nanosheets on N, P-codoping reduced graphene oxide (MoS2/N, P-rGO) have been successfully prepared via a facile two-step synthesis, where few-layered MoS2 nanosheets are chemically bonded onto the surface of N, P-rGO. As an anode material, MoS2/N, P-rGO exhibits a high specific capacity (462.7 mAh·g–1 at 100 mA·g–1 over 200 cycles), outstanding rate capability (224.9 mAh·g–1 at 20 A·g–1), and excellent cycle life (236.6 mAh·g–1 at 2 A·g1 after 7,000 cycles), much better than those of MoS2 and MoS2/rGO. These advanced performances outperform most of the reported anode materials for potassium ion batteries to date. Meanwhile, the K-storage reactions of MoS2/N, P-rGO have been disclosed through in-situ and ex-situ characterizations. The kinetics analysis confirms that K-storage of MoS2/N, P-rGO is predominant by pseudo-capacitance.
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N, P-codoped graphene supported few-layered MoS2 as a long-life and high-rate anode materials for potassium-ion storage. Nano Res. https://doi.org/10.1007/s12274-021-3606-6

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