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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2
はじめに
私が子どもの頃、乾電池で動くおもちゃといえば、あっという間に電池
切れになるのが常でした。やがて「持ちがいい」と評判の電池が次々と発
売され、ウォークマンの登場とともに、繰り返し充電できる電池が身近に
なり、気がつけばいろいろな種類の電池に囲まれていました。
一方で当時の乾電池は水銀、充電式の電池はカドミウムという有毒な金
属が使われていて、便利さと引き換えに環境負荷を与えていることに疑問
を感じたものでした。しかしあるとき「水銀ゼロ」の乾電池が、カドミウ
ムを含まない新しい充電式の電池が次々と発売されました。これらは世界
に先駆けて日本のメーカーが商品化に成功したものです。このとき「技術
革新が進めば、便利さと環境は両立する」ということを感じたものでした。
そして現在、最も身近な電池といえば、もはや生活必需品となったスマ
ートフォンに使われているリチウムイオン電池ではないでしょうか。この
リチウムイオン電池の開発で、吉野彰博士が2019 年のノーベル化学賞に
輝いたことは記憶に新しいことでしょう。受賞理由は、「スマートフォン
やPCをはじめとしたIT化社会への貢献」「 環境問題を解決する可能性が
あること」の 2つです。まさに「技術革新が進めば、便利さと環境は両立
する」という点が評価されたのでした。
連日のようにリチウムイオン電池に関するニュース報道が駆け巡ってい
ますが、多くの人がリチウムイオン電池を含めて、電池の中身やしくみ全
般について知ることはほとんどありません。
そこで本書では、まずは電池の種類を整理しながら、その開発史の流れ ...
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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.