| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
12th International Symposium on Green and Sustainable Technologies for Materials Manufacturing and Processing
|
| Presentation Title |
Green Process for Recycling of Nickel Hydroxide from End of Life Batteries into Films and Membranes |
| Author(s) |
Allen Apblett, Dewan Russel Rahman, Audrey Vecoven |
| On-Site Speaker (Planned) |
Allen Apblett |
| Abstract Scope |
Nickel hydroxides have numerous applications including their use as battery electrodes. It has been found that nickel hydroxide is readily recovered from used nickel metal hydride (NIMH) batteries by extraction as a solution of hexamminenickel(II) hydroxide, [Ni(NH3)6](OH)2. If ammonia is allowed to evaporate from the solution, the dissolution process is reversed and crystalline films of beta-Ni(OH)2 are deposited that consist of closely-packed micron-sized clumps of thin plates. Such films are useful in their own right but can also be converted to nickel oxide by calcination with the advantage that the absence of thermally-stable anions (e.g. chloride, nitrate, or sulfate) allow complete conversion to occur at relatively low temperature. Thus, this solution growth process provides a green method for preparation of both beta-Ni(OH)2 and nickel oxide films. Addition of sodium aluminate to the solution makes it possible to also prepare alpha-nickel hydroxide. |