TY - JOUR
T1 - Covalently binding ultrafine MoS2 particles to N, S co-doped carbon renders excellent Na storage performances
AU - Wang, Tian
AU - Xi, Qiao
AU - Wang, Ke
AU - Zeng, Zhichao
AU - Du, Zhuzhu
AU - Xu, Zhanwei
AU - Xie, Linghai
AU - Ai, Wei
AU - Huang, Wei
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/10/30
Y1 - 2021/10/30
N2 - MoS2 has attracted much interest for the potential application in sodium-ion batteries (SIBs) anodes because of the high theoretical capacity and electrochemical activity with Na. However, poor electrochemical performance caused by severe volume variations during the charge/discharge processes limits its practical application. Herein, we present an elaborately designed architecture comprising ultrafine MoS2 nanoparticles covalently bonded to N, S co-doped carbon (MoS2/NSC) via an in situ solid-state growth process, which displays high-capacity Na storage, fast sodiation/desodiation kinetics, and substantially mitigated volume fluctuations. As a consequence, MoS2/NSC delivers outstanding Na storage performances including a high reversible capacity of 340 mA h g−1 at 100 mA g−1 and a rate capacity of 208 mA h g−1 at 2000 mA g−1. Further assembling with a Na3V2(PO4)3/C cathode, the full-cell delivers a specific capacity of 238 mA h g−1 after 80 cycles at 50 mA g−1, demonstrating the great potential of our MoS2/NSC electrode. Density function theory calculations manifest that NSC not only presents strong binding to MoS2 but also significantly decreases the Na ion diffusion energy barrier, thus leading to robust structure stability and fast electrode kinetics. This study may open a new and efficient avenue for developing advanced MoS2 anodes for SIBs.
AB - MoS2 has attracted much interest for the potential application in sodium-ion batteries (SIBs) anodes because of the high theoretical capacity and electrochemical activity with Na. However, poor electrochemical performance caused by severe volume variations during the charge/discharge processes limits its practical application. Herein, we present an elaborately designed architecture comprising ultrafine MoS2 nanoparticles covalently bonded to N, S co-doped carbon (MoS2/NSC) via an in situ solid-state growth process, which displays high-capacity Na storage, fast sodiation/desodiation kinetics, and substantially mitigated volume fluctuations. As a consequence, MoS2/NSC delivers outstanding Na storage performances including a high reversible capacity of 340 mA h g−1 at 100 mA g−1 and a rate capacity of 208 mA h g−1 at 2000 mA g−1. Further assembling with a Na3V2(PO4)3/C cathode, the full-cell delivers a specific capacity of 238 mA h g−1 after 80 cycles at 50 mA g−1, demonstrating the great potential of our MoS2/NSC electrode. Density function theory calculations manifest that NSC not only presents strong binding to MoS2 but also significantly decreases the Na ion diffusion energy barrier, thus leading to robust structure stability and fast electrode kinetics. This study may open a new and efficient avenue for developing advanced MoS2 anodes for SIBs.
KW - Anode
KW - Density function theory calculations
KW - N, S co-Doped carbon
KW - Sodium-ion batteries
KW - Ultrafine MoS2 nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=85112769047&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2021.08.019
DO - 10.1016/j.carbon.2021.08.019
M3 - 文章
AN - SCOPUS:85112769047
SN - 0008-6223
VL - 184
SP - 177
EP - 185
JO - Carbon
JF - Carbon
ER -