非水電解質二次電池：nonaqueous, non-aqueous

Which is better, "nonaqueous electrolyte secondary battery" or "non-aqueous electrolyte secondary battery"?

ChatGPT:

Great question — both "nonaqueous electrolyte secondary battery" and "non-aqueous electrolyte secondary battery" are technically correct and understandable, but:

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✅ Preferred: nonaqueous electrolyte secondary battery (closed form, no hyphen)

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🔍 Why?

1. "Nonaqueous" is a well-established compound word in scientific and engineering contexts — especially in battery and electrochemistry fields.

   • Examples from literature: nonaqueous solvents, nonaqueous systems, nonaqueous electrolyte solutions

   • It appears in many technical journals and patents without a hyphen.

2. "Non-aqueous" with a hyphen is also grammatically correct, especially in more general or non-specialist writing, but it's less common in battery terminology.

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📘 Examples in practice:

• "Nonaqueous electrolyte secondary battery" is widely used in:

  • Patent titles and claims (e.g., in lithium-ion battery patents)

  • Scientific papers (e.g., Journal of Power Sources, Electrochimica Acta)

  • Standards (e.g., IEC, IEEE documents)

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✅ Recommendation:

Use "nonaqueous electrolyte secondary battery" — it's idiomatic, standard in the field, and consistent with technical writing conventions.