Harmonizing self-supportive VN/MoS2 pseudocapacitance core-shell electrodes for boosting the areal capacity of lithium storage. (September 2020)

• Record Type: Journal Article
• Authors: Xiong, T.; Su, H.; Yang, F.; Tan, Q.; Appadurai, P.B.S.; Afuwape, A.A.; Guo, K.; Huang, Y.; Wang, Z.; Balogun, M.-S. (Jie Tang)
• Is Part Of: Materials today energy. Volume 17(2020)
• Publication Date: 2020-09
• Subjects: Integrated electrode -- Double-shell hybridization -- 3D self-supportive -- Storage mechanism -- Lithium-ion batteries; Energy development -- Periodicals; Energy industries -- Periodicals; Power resources -- Periodicals; Energy policy -- Periodicals; Energy development; Energy industries; Energy policy; Power resources; Electronic journals; Periodicals; 621.042
• DOI: 10.1016/j.mtener.2020.100461
• Languages: English
• ISSNs: 2468-6069

Abstract

Abstract: Achieving high areal capacity current lithium-ion batteries (LIBs) become a significant challenge in fields of consumer electronics, vehicle electrification, and aerospace. One of the most important strategies to achieve high areal capacity is developing unique electrodes through a hybridization blueprint. Herein, we demonstrate the design of 3D self-supportive pseudocapacitance core-shell architecture electrode as high areal capacity anode for LIBs. The pseudocapacitive 1D−VN/2D−MoS2 nanowires/nanosheets core/shell coated on free-standing 3D carbon fiber textile (CFT) (denoted CFT-VN@MoS2 ) exhibit high areal capacity of 6.80 mAh cm −2 at 0.5 mA cm −2, attractive rate performance of 1.27 mAh cm −2 at 17.0 mA cm −2 as well as 80% capacitive contribution at 1.5 mV s −1 . The excellent storage performance of CFT-VN@MoS2 over CFT-VN and CFT-MoS2 anodes can be related to the synergistic effect of the dual pseudocapacitive storage mechanism of both VN and MoS2 and tailored 3D nanoarchitecture design. This present work urges an appropriate approach to improve the areal capacity and rate capability of self-supporting electrodes and may also be applicable to other hybrids for LIBs and beyond. Graphical abstract: Image 1 Highlights: A 1D-2D-3D double-core-shell electrode is design to further improve the areal capacity of LIB anode. The electrode consists of 1D VN nanowires and 2D MoS2 nanosheets on a 3D carbon fiber textile. A high areal capacity of 6.80 mAh cm −2 and attractive rate capability capacity up to 17.0 mA cm −2 was delivered. The excellent performance can be attributed to the synergistic effect and pseudocapacitance hybrid contributions.