A Passionfruit‐Like Carbon‐Confined Cu2ZnSnS4 Anode for Ultralong‐Life Sodium Storage. Issue 17 (15th March 2021)

• Record Type: Journal Article
• Authors: Sun, Bing; Zhang, Qin; Zhang, Chengzhi; Xu, Wenli; Wang, Jiapei; Yuan, Guanming; Lv, Wei; Li, Xuanke; Yang, Nianjun
• Is Part Of: Advanced energy materials. Volume 11:Issue 17(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-03-15
• Subjects: Cu2ZnSnS4 anode -- heterostructures -- high rate and stable -- sodium ion batteries; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.202100082
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: The sodium‐ion battery (SIB) is one of the new generation of electrochemical energy storage devices, although its life‐time needs to be improved. To assemble an SIB with an ultralong life‐time, passionfruit‐like Cu2 ZnSnS4 nanoparticles confined with nitrogen‐doped carbon (CZTS@C) are synthesized. As an alternative anode for an SIB, the CZTS@C anode exhibits a reversible capacity of 461 mA h g −1 at a current density of 50 mA g −1 after 140 charge/discharge cycles and excellent cycling stability (e.g., a capacity of 146 mA h g −1 at 4 A g −1 even after 1000 charge/discharge cycles). Such high performance originates from multiple electrons involved in the electrochemical reactions of the CZTS@C anode, as verified by in situ X‐ray diffraction measurements. As a conductive maskant, the carbon shell enhances the electric conductivity of the CZTS@C anode and further behaves as a blocked layer to maintain the structural integrity of this anode, namely to avoid the loss of active components. Several heterostructures that promote the reaction kinetics of the Na + storage are formed in the subsequent charging process, as proved by ex situ transmission electron microscopy. The remarkable performance based on this low‐cost CZTS anode may pave the way to develop commercial SIBs. Abstract : A passionfruit‐like transition metal sulfide, consisting of the seeds of Cu2 ZnSnS4 nanoparticles and a carbon shell, is utilized as the anode to assemble sodium ion batteries (SIBs). Due to the multiple electron transfer processes, the formation of a heterointerface during the first charge/discharge process, and the high stability of this anode, the as‐fabricated SIB exhibits enhanced kinetics, a high capacity, and an ultralong lifetime.