2005年11月10日
ナス電池
ナス電池と言っても、野菜の"茄子"が電池になるわけではない。本当はNaS電池、正確に書くと、ナトリウム(Na)－硫黄(S)電池のことである。近年話題の2次（充電可能な）電池らしいのだが、僕はたった今知った。ニッカド電池やリチウム電池は身近にあってよく知っているが、エネルギー活用の視点から見て、このNaS電池の有効性は高いらしい。
突然、「NaS電池とは何か」と聞かれ、「へっ!?」だったのだ。化学の中でも無機化学は滅法弱い。正直言うと、高校生の頃から、オストワルト法とかソルベー法とかにあまり興味が無かった。もちろん、これらは産業上の大革命だと思うし、原料の無駄を極端に省いた画期的な生産手法だ。しかし、無機化学だけに、感動も無機質だったのだ。とりあえず、反応を丸暗記しないといけないのが、どうも嫌だった。なぜ、そのような反応が進むのか詳しく教えてもらえなかったのがいけないのではないか（でも、それは指導要領範囲外ですから…）。
で、NaS電池のことをネットを使って少し調べたけれども、腑には落ちていない。さすがに専門書をひも解くほど暇じゃないので、大まかな反応原理の理解程度に留めておかなくてはならない。見た目は簡単な酸化還元反応式だが、その分子構造や電子軌道の問題まで理解しなければ、どうも納得がいかないのでした…。
投稿者 はるお : 2005年11月10日 00:53
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