The MoS2-Embedded Carbon Sphere as an Anode Materials for Sodium Ion Battery

The MoS2-Embedded Carbon Sphere as an Anode Materials for Sodium Ion Battery
MoS2; Carbon compostie; Anode materials; Sodium-ion battery
Issue Date
International Battery Association 2018
The MoS2-Embedded Carbon Sphere as an Anode Materials for Sodium Ion Battery Hyojun Lim1,2,*, Hyeongwoo Kim1,3, Dowon Kim1,3 and Wonchang Choi1,2,** 1 Center for Energy Convergence Research, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea 2 Division of Energy & Environment Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea. 3 Department of Materials science and Engineering, Korea University, 17, Anam-dong, Seongbuk-gu, Seoul 136-701, Republic of Korea E-mail**: Recently, sodium-ion batteries (SIBs) have attracted intensive attention due to low cost and natural abundance of sodium, compared to lithium. Among all proposed anode materials for SIBs, molybdenum disulfide (MoS2) is a desirable candidate for an anode material of SIBs because the unique two-dimensional (2D) layered structure of MoS2 is favorable for initial ion intercalation/deintercalation, and the followed conversion reaction enables high theoretical capacity. Despite these advantages of MoS2, low rate capability and poor cycling stability are the main challenges for MoS2 anode in SIBs because of its low electrical conductivity and volume expansion of layer structure during repeated sodiation/desodiatation. To solve these obstacles, many efforts have been devoted to fabricating MoS2-Carbon composite structures, which can effectively improve the electrical conductivity and accommodate volume expansion of MoS2. However, the facile synthesis of MoS2-Carbon composite structures still remains a challenge. Herein, we synthesize the MoS2-embedded carbon microsphere composite (MoS2@C) via a facile self-catalyzed wet chemical method by using furfural as a carbon source to improve the sodium storage performance of MoS2 as an anode for SIBs. The MoS2@C demonstrate enhanced rate capability and cycling ability for sodium ion
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