Free-standing SnS/carbonized cellulose film as durable anode for lithium-ion batteries. (1st March 2021)

• Record Type: Journal Article
• Authors: Yuan, Fanshu; Huang, Yang; Qian, Jieshu; Rahman, Muhammad M.; Ajayan, Pulickel M.; Sun, Dongping
• Is Part Of: Carbohydrate polymers. Volume 255(2021)
• Publication Date: 2021-03-01
• Subjects: Tin (II) sulfide -- Carbonized bacterial cellulose -- Three-dimensional structure -- Nanofibers -- Free-standing anodes -- Li-ion batteries; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2020.117400
• Languages: English
• ISSNs: 0144-8617

Abstract

Graphical abstract: Highlights: Carbon aerogels from bacterial cellulose are employed as the electrode substrates. Cellulose fibers act as templates for decoration of the wrinkled SnS nanosheets. The composite electrode shows three dimensional interconnected nanostructures. Free-standing anodes show superior lithium storage capacity and rate performance. Abstract: Metal sulfides have recently attracted broad attention for lithium-ion batteries (LIB) owing to their high theoretical capacity and long lifetime. However, the inferior structural integrity and low electron conductivity of metal sulfides limit their practical applications. A feasible strategy is to distribute these materials in conductive carbonaceous substrates with shapeable morphology. Here we report the design of free-standing films of tin sulfide (SnS) nanosheets distributed uniformly on carbonized bacterial cellulose (CBC) nanofibers. The SnS/CBC composites possess three dimensional interconnected nanostructures, which is crucial for the high conductivity and high lithium storage capacity. LIB using SnS/CBC as anode exhibits a reversible capacity of 872 mA h g −1 at 100 mA g -1 after 100 cycles, and the capacity remains as high as 527 mA h g −1 at 2000 mA g −1 after 1000 cycles. The free-standing sulfide-based nanocomposites with unique nanostructure composition and flexibility could be utilized as promising electrode materials for future LIB systems.