Next Article in Journal
A Bilevel Equalizer for Large Lithium Ion Batteries
Previous Article in Journal
Nanostructured Networks for Energy Storage: Vertically Aligned Carbon Nanotubes (VACNT) as Current Collectors for High-Power Li4Ti5O12(LTO)//LiMn2O4(LMO) Lithium-Ion Batteries
Previous Article in Special Issue
Performance Comparison between AB5 and Superlattice Metal Hydride Alloys in Sealed Cells
Article Menu
Issue 4 (December) cover image

Export Article

Open AccessArticle
Batteries 2017, 3(4), 38; doi:10.3390/batteries3040038

A Ni/MH Pouch Cell with High-Capacity Ni(OH)2

1
BASF/Battery Materials—Ovonic, 2983 Waterview Drive, Rochester Hills, MI 48309, USA
2
Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, MI 48202, USA
*
Author to whom correspondence should be addressed.
Received: 26 September 2017 / Revised: 16 November 2017 / Accepted: 21 November 2017 / Published: 4 December 2017
(This article belongs to the Special Issue Nickel Metal Hydride Batteries 2017)
View Full-Text   |   Download PDF [3498 KB, uploaded 4 December 2017]   |  

Abstract

Electrochemical performances of a high-capacity and long life β-α core-shell structured Ni0.84Co0.12Al0.04(OH)2 as the positive electrode active material were tested in a pouch design and compared to those of a standard β-Ni0.91Co0.045Zn0.045(OH)2. The core-shell materials were fabricated with a continuous co-precipitation process, which created an Al-poor core and an Al-rich shell during the nucleation and particle growth stages, respectively. The Al-rich shell became α-Ni(OH)2 after electrical activation and remained intact through the cycling. Pouch cells with the high-capacity β-α core-shell positive electrode material show higher charge acceptances and discharge capacities at 0.1C, 0.2C, 0.5C, and 1C, improved self-discharge performances, and reduced internal and surface charge-transfer resistances, at both room temperature and −10 °C when compared to those with the standard positive electrode material. While the high capacity of the core-shell material can be attributed to the α phase with a multi-electron transfer capability, the improvement in high-rate capability (lower resistance) is caused by the unique surface morphology and abundant interface sites at the β-α grain boundaries. Gravimetric energy densities of pouch cells made with the high-capacity and standard positive materials are 127 and 110 Wh·kg−1, respectively. A further improvement in capacity is expected via the continued optimization of pouch design and the use of high-capacity metal hydride alloy. View Full-Text
Keywords: metal hydride alloy; nickel metal hydride battery; pouch cell; electrochemistry; alpha nickel hydroxide; core shell metal hydride alloy; nickel metal hydride battery; pouch cell; electrochemistry; alpha nickel hydroxide; core shell
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Yan, S.; Meng, T.; Young, K.-H.; Nei, J. A Ni/MH Pouch Cell with High-Capacity Ni(OH)2. Batteries 2017, 3, 38.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Batteries EISSN 2313-0105 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top