March 2023
Intermediate
240 pages
7h 3m
Japanese
Content preview from 図解まるわかり 電池のしくみ
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142
リチウムイオン含有、複合材料
リチウムイオン電池の分類
4-7
負極活物質による分類
コバルト酸リチウムイオン電池以外にも、リチウムイオン電池には実用
化されているものがあります。そのほとんどが負極活物質に、一番たくさ
んのリチウムイオンをインターカレーションできる黒鉛が使われています
（図4-13）。
近年では、黒鉛の代わりにチタン酸リチウムが再評価され、負極活物質
に用いたリチウムイオン電池が実用化されています。
正極活物質による分類
正極活物質には、電池を組み立てるときにリチウムイオンを外部から供
給しなくてもいいように、例えばコバルト酸リチウムのように、リチウム
イオンを含有しているものが求められています。
リチウムイオン電池を正極活物質で分類すると、コバルト系、マンガン
酸系、リン酸系、三元系（NCM系またはNMC 系）、ニッケル系（NCA 系）
に分類されます（図4-14）。これらの電池では、負極活物質には黒鉛が使
用されています。
また車載用には適さなかったコバルト系（4-5）以外は、すべて車載用
として開発されたものになります。マンガン系はマンガン酸リチウム、リ
ン酸系はリン酸鉄リチウムが代表的な正極活物質となります。
三元系とは、コバルト酸リチウムのコバルトの一部をニッケルとマンガ
ンに置換した、3 つの金属元素からなる比較的新しい複合材料です。
ニッケル系とは、酸化ニッケルリチウムのニッケルをベースに、一部を
コバルトで置換し、アルミニウムを添加した、3つの金属元素からなる複
合材料です。
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.