2013 Fiscal Year Final Research Report
A pioneer research for preparation of garnet-type solid electrolyte using sol-gel method
| Project/Area Number |
24750187
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Functional materials/Devices
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| Research Institution | Hakodate National College of Technology |
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Principal Investigator |
KOTOBUKI Masashi 函館工業高等専門学校, 物質環境工学科, 准教授 (20432164)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | リチウム電池 / 固体電解質 |
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| Research Abstract |
A preparation of Li7La3Zr2O12 (LLZ) solid electrolyte via a sol-gel method was examined. A precursor sol for the LLZ was successfully prepared by an optimization of ingredient concentration, i.e. acetic acid, water, alcohol, lithium acetate and lanthanum acetate. It has been well known a cubic LLZ possesses high lithium ion conductivity compared with its tetragonal phase. The cubic LLZ could be obtained by a calcination of the precursor at 1100oC which was 130oC lower than conventional methods.
Subsequently, a preparation of basic precursor sol for LLZ was also attempted by using NH3. In the basic precursor sol, it was found that a rate of gelation was much faster than that of the acidic sol, allowing us to reduce a preparation time.
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