Nickel hydroxide composite material for alkaline rechargeable battery
AssigneeBASF SE
InventorsKwo Young, William C. Mays, Lixin Wang
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Abstract
Provided are uniquely structured electrochemically active particles characterized by a first electrochemically active material and a second electrochemically active material disposed about the first material whereby at least the second material includes a modifier present as a continuous transition concentration gradient from the first material into the second material whereby the concentration is lower in the first material than the second material. Also provided are processes of producing the particle and electrochemical cells incorporating the particles as a positive electrode material in a cathode.
Claims19
An electrochemically active particle comprising:
- a first electrochemically active material;
- and
- a second electrochemically active material disposed about the first electrochemically active material, the second active material being the outermost material, the second electrochemically active material comprising single element modifier, the modifier present as a continuous transition concentration gradient from said first electrochemically active material into said second electrochemically active material wherein the first electrochemically active material and the second electrochemically active material form a solid solution throughout the electrochemically active particle, and the modifier concentration being lower in the first electrochemically active material than in the second electrochemically active material, and wherein the atomic percentage of constituent elements excluding the modifier of the first electrochemically active material and the second electrochemically active material differ by less than 20 atomic percent, wherein the first electrochemically active material and the second electrochemically active material comprise nickel as a metallic predominant.
Dependencies are inferred from the claim text.