As most anode materials cannot achieve sodium storage performance close to their theoretical capacity as a result of sluggish reaction kinetics under repeated cycles, herein, we propose an interlaced reaction strategy based on logical component design with a core-shell structure to improve the reversible capacity for sodium storage. Sb2S3/MoS2 and Sb2S3/SnS2 core-shell nanowires (NWs) are demonstrated as proof of concept: first, the theoretical capacity of Sb2S3 is in between those of MoS2 and SnS2 (Sb2S3: 946 mAh/g; MoS2: 670 mAh/g; SnS2: 1136 mAh/g); second, the conversion and alloying processes for Sb2S3 (voltage range < 0.7 V) are interlaced with the intercalation and conversion processes of MoS2 but overlap with those of SnS2. Sb2S3/MoS2 is found having the lowest theoretical capacity but, benefiting by the interlaced reaction, performing the highest reversible capacity in the actual test. As an important factor, the intercalation process of MoS2, which induces the phase transition of 2H MoS2 to the 1T phase, interlaces with the conversion and alloying processes of Sb2S3 and facilitates the reaction kinetics of the composites. Logical component design based on the interlaced reaction opens a new avenue for developing advanced sodium storage materials.
Bibliographical noteFunding Information:
P. Li and J. Y. Jeong contributed equally. J.H.Park acknowledges the support by the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT ( 2018M3D1A1058624 (Creative Materials Discovery Program), 2019R1A2C3010479 ). This work was also supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20173010013340 ).
© 2019 Elsevier B.V.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Energy Engineering and Power Technology