3D Interconnected and Multiwalled Carbon@MoS2 @Carbon Hollow Nanocables as Outstanding Anodes for Na-Ion Batteries

Yan Wang; Qunting Qu; Guangchao Li; Tian Gao; Feng Qian; Jie Shao; Weijie Liu; Qiang Shi; Honghe Zheng

doi:10.1002/smll.201602268

3D Interconnected and Multiwalled Carbon@MoS₂ @Carbon Hollow Nanocables as Outstanding Anodes for Na-Ion Batteries

Small. 2016 Nov;12(43):6033-6041. doi: 10.1002/smll.201602268. Epub 2016 Sep 5.

Authors

Yan Wang^{1

2}, Qunting Qu², Guangchao Li³, Tian Gao², Feng Qian², Jie Shao¹, Weijie Liu², Qiang Shi², Honghe Zheng²

Affiliations

¹ College of Chemistry, Chemical Engineering and Material Science and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu, 215006, China.
² College of Physics, Optoelectronics and Energy, Soochow University, Suzhou, Jiangsu, 215006, China.
³ Technical Center for Mechanical and Electrical Product Inspection and Testing, Shanghai Entry-exit Inspection and Quarantine Bureau, Shanghai, 200135, China.

PMID: 27594675
DOI: 10.1002/smll.201602268

Abstract

Currently, the specific capacity and cycling performance of various MoS₂ /carbon-based anode materials for Na-ion storage are far from satisfactory due to the insufficient structural stability of the electrode, incomplete protection of MoS₂ by carbon, difficult access of electrolyte to the electrode interior, as well as inactivity of the adopted carbon matrix. To address these issues, this work presents the rational design and synthesis of 3D interconnected and hollow nanocables composed of multiwalled carbon@MoS₂ @carbon. In this architecture, (i) the 3D nanoweb-like structure brings about excellent mechanical property of the electrode, (ii) the ultrathin MoS₂ nanosheets are sandwiched between and doubly protected by two layers of porous carbon, (iii) the hollow structure of the primary nanofibers facilitates the access of electrolyte to the electrode interior, (iv) the porous and nitrogen-doping properties of the two carbon materials lead to synergistic Na-storage of carbon and MoS₂ . As a result, this hybrid material as the anode material of Na-ion battery exhibits fast charge-transfer reaction, high utilization efficiency, and ultrastability. Outstanding reversible capacity (1045 mAh g^-1 ), excellent rate behavior (817 mAh g^-1 at 7000 mA g^-1 ), and good cycling performance (747 mAh g^-1 after 200 cycles at 700 mA g^-1 ) are obtained.

Keywords: 3D; Na-ion batteries; carbon; hollow; molybdenum disulfide.