A high performance direct borohydride fuel cell employing cross-linked chitosan membrane

Jia Ma, Nurul A. Choudhury, Yogeshwar Sahai, Rudolph G. Buchheit

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

A cross-linked chitosan (CCS) membrane has been prepared by a solution casting method using sulfuric acid as cross-linking agent. The CCS membrane was used as the polymer electrolyte and separator in a direct borohydride fuel cell (DBFC). Ionic conductivity and borohydride crossover rate have been measured for the CCS membrane. The DBFC used in this study employed nickel-based composite as anode catalyst and Nafion® as anode binder. The power performance of the CCS membrane-based DBFC was compared with a similar DBFC employing Nafion® 212 (N212) membrane as electrolyte /separator. The CCS membrane-based DBFC exhibited better power performance as compared to N212 membrane-based DBFC. Encouraged by this result, chitosan chemical hydrogel (CCH) was prepared and used as binder for anode catalysts. A DBFC comprising CCS membrane and CCH as anode binder was studied and found to exhibit even better power performance at all temperatures in this study. A maximum peak power density of 450 mW cm-2 was observed at 60 C for DBFC employing CCS membrane and CCH binder-based anode. The chitosan-based DBFC was operated continuously for 100 h and its performance stability was recorded.

Original languageEnglish
Pages (from-to)8257-8264
Number of pages8
JournalJournal of Power Sources
Volume196
Issue number20
DOIs
StatePublished - Oct 15 2011

Bibliographical note

Funding Information:
Financial support for this work was provided by the Third Frontier Fuel Cell Program of State of Ohio and ITN Energy Systems of Littleton Colorado .

Keywords

  • Binder
  • Chemical hydrogel
  • Chitosan
  • Cross-link
  • Direct borohydride fuel cell
  • Membrane

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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