Role of Titanium Dioxide in Enhancing the Performance of the Alkaline Manganese Dioxide Cathode | Zendy

Mark R. Bailey | Zendy; John A. Denman | Zendy; B.V. King | Zendy; Scott W. Donne | Zendy

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Role of Titanium Dioxide in Enhancing the Performance of the Alkaline Manganese Dioxide Cathode

Author(s) -

Mark R. Bailey,

John A. Denman,

B.V. King,

Scott W. Donne

Publication year - 2011

Publication title -

journal of the electrochemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.258

H-Index - 271

eISSN - 1945-7111

pISSN - 0013-4651

DOI - 10.1149/2.080202jes

Subject(s) - manganese , cathode , electrolyte , titanium dioxide , electrochemistry , intercalation (chemistry) , porosity , electrode , titanium , inorganic chemistry , chemistry , chemical engineering , ion , proton , materials science , analytical chemistry (journal) , metallurgy , composite material , environmental chemistry , physics , organic chemistry , quantum mechanics , engineering

In this work the role ofTi02 in improving cathode performance has been investigated through the use of electrode imaging, porosity changes, electrochemical characterisation and changes in the chemical composition of constituent y-Mn02 particles. Time-of-flight . secondary ion mass spectrometry studies revealed that Ti02 is mobile in the electrolyte and associates itself with the porous y-Mn02 surface. This association gives rise to improved electrode performance by allowing electron/proton pairs to more easily (de)intercalate intci the Mn02 structure. Depth profiling confirmed that upon cycling surface Ti02 becomes incorporated into the bulk y-Mn02 structure inhibiting proton diffusion. © 2011 The Electrochemical Society. [DOI: 10.l 149/2.080202jes] All rights reserved.

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