硬碳

hard carbon的用法和样例：

例句

The positive electrode is a rod of hard carbon fitted with a brass cap.正电极是一个装有黄铜帽的硬碳棒。
Hard carbon is a promising anode material for lithium ion batteries due to its high capacity and low cost.摘要硬碳具有嵌锂容量大，造价低，循环寿命长等优点，是制备高安全性锂离子电池负极潜在的优良材料。

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