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鋅碘單液流電池概念問世 大幅提高電池能量密度
來源:經濟日報 日期:2019-03-25 訪問次數: 字號:[ ]

  經濟日報訊 記者蘇大鵬報道:近日,中國科學院大連化物所研究員李先鋒、張華民領導的研究團隊創新性提出鋅碘單液流電池的概念,實現鋅碘單液流中電解液的利用率達到近100%,大幅提高了電池的能量密度。相關研究成果在線發表于《能源環境科學》上。
  大規模儲能技術是實現可再生能源大規模利用的關鍵技術,液流電池因具有安全性高、循環壽命長、效率高等特點,是大規模儲能的首選技術之一。而鋅碘液流電池是液流電池技術的一種,因具有較高能量密度和環境友好等優勢,近年來受到越來越多的關注。
  在前期研究中,該科研團隊通過優化電解液組成和膜材料,提高了鋅碘液流電池的循環壽命和功率密度。但是,電解質利用率相對較低問題仍待解決。
  隨后,該團隊提出了鋅碘單液流電池的概念。與傳統鋅碘液流電池不同,鋅碘單液流電池只有負極一側具有流動循環系統,正極為固體,因此碘離子可以充電到固態碘單質,使得電解質的利用率接近100%,大幅提高了電池的能量密度,并同時提高了鋅碘單液流電池的功率密度。上述工作為高能量密度液流電池新體系的開發提供了重要借鑒。

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