Enhanced storage of sodium ions in Prussian blue cathode material through nickel doping

Author(s): Haoyu Fu ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Chaofeng Liu ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Changkun Zhang ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Wenda Ma ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Kan Wang ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Zhuoyu Li ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Xianmao Lu ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Guozhong Cao ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵

Publication date (Electronic): 2017

Journal: Journal of Materials Chemistry A

Publisher: Royal Society of Chemistry (RSC)

Read this article at

ScienceOpenPublisher

Bookmark

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

Ni-doped Prussian blue (PB) cathode material exhibited improved storage performance for sodium ions, suggesting an electrochemically activated C-coordinated Fe ion in PB.

Abstract

Prussian blue (PB) is a promising and cost-effective material for sodium ion batteries (SIBs) because it possesses fast diffusion channels for migration of Na ions and features a two-electron redox reaction mechanism that offers a high theoretical capacity of 170 mA h g ⁻¹. However, it is difficult to attain the full discharge capacity of PB in SIBs using the low-spin Fe ²⁺/Fe ³⁺ redox couple. In the present study, we found that doping PB with Ni ions (1–10%) resulted in enhanced electrochemical storage capacity and facilitated fast diffusion of Na ions during discharge. Specifically, PB doped with 3% Ni ions showed a discharge capacity of 117 mA h g ⁻¹, within which ≈50 mA h g ⁻¹ was attributed to the low-spin Fe ²⁺C ₆/Fe ³⁺C ₆ redox couple. Even though we do not know how to attain the full storage capacity of PB, this research sheds light on how substituting transition metal ions affects the electrochemical performance of PB. A new perspective of the electrochemical mechanism is also proposed for further understanding and improvement of its electrochemical performance.

Related collections

Most cited references 58

Record: found
Abstract: not found
Article: not found

Building better batteries.

M Armand, J.-M. Tarascon (2008)

0 comments Cited 2317 times – based on 0 reviews      Review now

Bookmark

Record: found
Abstract: found
Article: not found

Electrical energy storage for the grid: a battery of choices.

Bruce Dunn, Haresh Kamath, Jean-Marie Tarascon (2011)

The increasing interest in energy storage for the grid can be attributed to multiple factors, including the capital costs of managing peak demands, the investments needed for grid reliability, and the integration of renewable energy sources. Although existing energy storage is dominated by pumped hydroelectric, there is the recognition that battery systems can offer a number of high-value opportunities, provided that lower costs can be obtained. The battery systems reviewed here include sodium-sulfur batteries that are commercially available for grid applications, redox-flow batteries that offer low cost, and lithium-ion batteries whose development for commercial electronics and electric vehicles is being applied to grid storage.