JP2020174040A - 巻取り可能なフレキシブル高分子基材固体電解質の二次電池構造及びその製造方法 - Google Patents
巻取り可能なフレキシブル高分子基材固体電解質の二次電池構造及びその製造方法 Download PDFInfo
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Abstract
Description
上述した固体イオン材料は、正極及び負極を貼り付けると正極/固体イオン材料/負極が形成され、全固体二次電池を形成していた。しかし上述したように電解液の代替としてマグネシウム固体電解質を用いると、電池の性能及び寿命を大幅に向上させることができる半面、電解液が漏れ出て安全上の問題が生じる虞があった。
ステップ(1):布質固体電解質の一側に正極層をめっき形成する。
ステップ(2):布質固体電解質の他側に負極層をめっき形成する。
ステップ(3):熱処理工程を行い、正極層と布質固体電解質との間に第1の炭化層を形成し、負極層と布質固体電解質との間に第2の炭化層を形成する。好適には、上述した熱処理工程とは、例えば、温度が約80〜150℃の環境下で30〜300秒持続して行う赤外線処理又はマイクロ波処理である。
負極層5と布質固体電解質3との界面と、正極層1と布質固体電解質3との界面とには炭化層2,4がそれぞれ形成され、炭化層2,4が炭化マグネシウム(MgC)、炭化リチウム(LiC)、又は金属炭化物などからなるため、布質固体電解質の二次電池に高温電池応用特性を持たせることができる。
正極層1は、マグネシウム(Mg)化合物、リチウム(Li)化合物、ナトリウム(Na)化合物、ガリウム(Ga)化合物、錫(Sn)化合物又は合金金属箔からなり、スパッタ法、ビーム蒸着法、蒸着法、塗装法などの方式により形成してもよい。負極層5は、炭素(C)膜、金属膜又は合金膜からなり、スパッタ法、ビーム蒸着法、蒸着法、塗装法などの方式により形成してもよい。布質固体電解質3は、不織布又は綿布材料からなり、不織布を選択する場合、ポリプロピレン(PP)、ポリエチレン(PE)、ポリエチレンテレフタレート(PET)又はナイロン材料からなってもよい。この布質固体電解質3は、折曲げ、巻取り、積層することなどができる。
各種固体電池:正極/布質固体電解質(Bと称する)/炭素極の様々な温度条件下における平均充放電容量(充電:12V−1h、充放電回数:100回)のテスト結果を以下の表1に示す。
(1)電解液を使用せず、高分子基材固体電解質が使用されているため、電解液が漏れ出て健康及び環境に悪影響を与えることを防ぐことができる。
(2)本発明の電池構造は環境を汚染しない安全な材料からなり、マグネシウムがアルカリ土類金属であって価電子数が2であるため、価電子数が1であるリチウムと比べ、2倍近い電力が得られる上、マグネシウムにはデントライトが発生し難く、電池が爆発することを防ぐ。
(3)耐熱性、高電気容量及び急速充放電性能を有する。
(4)布質固体電解質が使用されているため、二次電池の完成品は折曲げ及び巻取りが可能である。
2 炭化層
3 布質固体電解質
4 炭化層
5 負極層
Claims (10)
- 巻取り可能なフレキシブル高分子基材固体電解質の二次電池の製造方法であって、
布質固体電解質の一側に正極層をめっき形成するステップ(1)と、
前記布質固体電解質の他側に負極層をめっき形成するステップ(2)と、
熱処理工程を行い、前記正極層と前記布質固体電解質との間に第1の炭化層を形成し、前記負極層と前記布質固体電解質との間に第2の炭化層を形成するステップ(3)と、を含むことを特徴とする、
巻取り可能なフレキシブル高分子基材固体電解質の二次電池の製造方法。 - 前記正極層は、マグネシウム基金属、リチウム基金属、ナトリウム基金属、ガリウム基金属、錫基金属又は合金金属箔であることを特徴とする請求項1に記載の巻取り可能なフレキシブル高分子基材固体電解質の二次電池の製造方法。
- 前記負極層は、炭素膜、金属膜又は合金膜であることを特徴とする請求項1に記載の巻取り可能なフレキシブル高分子基材固体電解質の二次電池の製造方法。
- 前記布質固体電解質は、不織布又は綿布であり、前記不織布は、ポリプロピレン(PP)、ポリエチレン(PE)、ポリエチレンテレフタレート(PET)又はナイロン材料からなることを特徴とする請求項1に記載の巻取り可能なフレキシブル高分子基材固体電解質の二次電池の製造方法。
- 前記熱処理工程は、温度が80〜150℃の環境下で30〜300秒持続して行う赤外線処理又はマイクロ波処理であることを特徴とする請求項1に記載の巻取り可能なフレキシブル高分子基材固体電解質の二次電池の製造方法。
- 前記第1の炭化層及び前記第2の炭化層は金属炭化物であることを特徴とする請求項1に記載の巻取り可能なフレキシブル高分子基材固体電解質の二次電池の製造方法。
- 正極層、第1の炭化層、布質固体電解質、第2の炭化層、及び負極層をこの順に有することを特徴とする、
巻取り可能なフレキシブル高分子基材固体電解質の二次電池構造。 - 前記正極層は、マグネシウム基金属、リチウム基金属、ナトリウム基金属、ガリウム基金属、錫基金属又は合金金属箔であり、前記負極層は、炭素膜、金属膜又は合金膜であることを特徴とする請求項7に記載の巻取り可能なフレキシブル高分子基材固体電解質の二次電池構造。
- 前記布質固体電解質は、不織布又は綿布であり、前記不織布は、ポリプロピレン(PP)、ポリエチレン(PE)、ポリエチレンテレフタレート(PET)又はナイロン材料からなることを特徴とする請求項7に記載の巻取り可能なフレキシブル高分子基材固体電解質の二次電池構造。
- 前記第1の炭化層及び前記第2の炭化層は金属炭化物であることを特徴とする請求項7に記載の巻取り可能なフレキシブル高分子基材固体電解質の二次電池構造。
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EP3723168B1 (en) | 2023-08-16 |
KR20200120880A (ko) | 2020-10-22 |
CN111816914B (zh) | 2021-10-29 |
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