Dual Enhancement of Sodium Storage Induced through Both S-Compositing and Co-Doping Strategies

Abstract

As a promising alternative to lithium-ion batteries (LIBs), rechargeable sodium-ion batteries (SIBs) are attracting enormous attention due to the abundance of sodium. However, the lack of high-performance sodium anode materials limits the commercialization of SIBs. In this work, the dual enhancement of SnS 2 /graphene anodes in sodium storage is achieved through Scompositing and Co doping via an innovative one-step hydrothermal reaction at a relatively low temperature of 120 °C. The asprepared 7% Co-SnS 2 /S@r-G composite consisting of 15.4 wt % S and 1.49 atom % Co shows both superior cycling stability (over 1000 cycles) and rate capability, giving high reversible specific capacities of 878, 608, and 470 mAh g −1 at 0.2, 5, and 10 A g −1 , respectively. More encouragingly, the full-cell also exhibits an outstanding long-term cycling performance under 0.5 A g −1 , which delivers a reversible capacity of 500 mAh g −1 over 200 cycles and still retains a high reversible capacity of 432 mAh g −1 over 400 cycles. The enhancement mechanism is attributed to the favorable three-dimensional structure of the composite, Co doping, and Scomposition, which can induce a synergistic effect.

A Dual‐Functional Organic Electrolyte Additive with Regulating Suitable Overpotential for Building Highly Reversible Aqueous Zinc Ion Batteries

“…Traditional lithium-ion batteries suffer from high prices, [1] safety risks, [2] and constraints on lithium resources, [3] which makes people have to consider the development of other energy storage systems. [4][5][6][7] Aqueous zinc ion batteries (AZIBs) have…”

“…Traditional lithium‐ion batteries suffer from high prices, [ 1 ] safety risks, [ 2 ] and constraints on lithium resources, [ 3 ] which makes people have to consider the development of other energy storage systems. [ 4–7 ] Aqueous zinc ion batteries (AZIBs) have received more and more attention for their high safety, [ 8 ] environmental friendliness, [ 9 ] low price, [ 10 ] and ease of production. [ 11–14 ] However, hydrogen evolution reaction (HER), [ 15 ] by‐product generation, [ 16 ] and deterioration of dendrites [ 17 ] have been affecting the safety and lifespan of AZIBs, [ 18 ] thus hindering their practical application.…”

Low‐Cost Multi‐Function Electrolyte Additive Enabling Highly Stable Interfacial Chemical Environment for Highly Reversible Aqueous Zinc Ion Batteries

“…With the increasing demand for energy storage, [ 1–5 ] researchers are eager to develop next‐generation energy storage systems that can better respond to different energy storage scenarios. [ 6–11 ] Aqueous batteries have gained considerable attention in recent years for the merits of low cost and high safety. [ 12,13 ] Among them, aqueous zinc ion batteries (AZIBs) stand out with a high theoretical specific capacity (820 mAh g −1 ) and abundant natural resources (zinc has a content of 0.075‰ in the earth's crust), [ 14–17 ] making them highly promising for applications in large‐scale energy storage power stations.…”