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  • 研究人員發明新涂層 可使金屬鋰電池更穩定

    • 2019-08-28 09:55
    • 來源:快科技

    摘要:美國斯坦福大學和SLAC國家加速器實驗室的研究人員研究指出,他們發明了一種新的涂層,可以使輕量金屬鋰電池安全持久,這將引領下一代電動汽車的誕生。

    美國斯坦福大學和SLAC國家加速器實驗室的研究人員發表在《焦耳》雜志上的一項研究指出,他們發明了一種新的涂層,可以使輕量金屬鋰電池安全持久,這將引領下一代電動汽車的誕生。

    在實驗室測試中,涂層顯著延長了電池的壽命,它還通過極大地限制穿透電池正負極之間隔板的析鋰來處理燃燒問題。

    研究人員指出,金屬鋰電池每磅的能量至少比鋰離子電池多三分之一,而且非常輕,因為它們使用輕量鋰作為帶正電荷的一端,而不是更重的石墨。如果金屬鋰電池更可靠,從筆記本電腦到手機,這些便攜式電子產品都能從中受益,但真正的收入來源將是汽車。電動汽車最大的阻力是電池就占據了成本的四分之一,這觸及電動汽車生產成本的核心問題。

    傳統鋰離子電池的容量已經發展到了極限,因此,開發新型電池以滿足現代電子設備的高能量密度要求至關重要。

    斯坦福大學和SLAC的研究小組在一個標準金屬鋰電池的正電荷端(稱為陽極)上測試了它們的涂層,正電荷端通常形成析鋰。最終,他們將特殊涂層的陽極與其他市場上可買到的組件結合起來,創造出一種完全可運行的電池。經過160次循環使用后,他們的金屬鋰電池仍能提供第一次循環時85%的電能。普通的金屬鋰電池在如此多次循環后會大概只能釋放約30%的能量,即使它們不會爆炸,作用也不大了。

    這種新的涂層通過形成一個分子網絡來阻止析鋰的形成,這個網絡可以將帶電的鋰離子均勻地輸送到電極上。它可以防止這些電池發生不必要的化學反應,還可以減少陽極上的化學物質積聚以避免它們破壞電池的供電能力。

    研究小組目前正在改進其涂層設計,以便在更多周期內測試電池及提高容量保持率。

    網友評論文明上網理性發言,請遵守評論服務協議
    賬號登錄注冊后參與評論

    動力電池行業 動力電池報廢潮將至 回收利用須追本溯源

    中國汽車工業協會公布的數據顯,2019年1—8月,我國新能源汽車銷量為79.3萬輛,保持著同比32%的增速。隨著新能源汽車的大規模推廣和應用,廢舊動力蓄電池的綜合利用問題顯得尤為緊迫。
    2019-10-23

    動力電池行業 阿貢團隊開發新電解質 提升鋰離子電池中硅負極的性能

    美國能源部阿貢國家實驗室的研究人員,開發出新型電解質混合物和一種簡單的添加劑,可以增加硅負極的表面和整體穩定性,有望應用于下一代鋰離子電池。
    關鍵字: 電解質
    2019-10-23

    動力電池行業 電池聯盟:9月動力電池裝車量4GWh 中航鋰電升至第三

    9月,我國動力電池產量共計7.6GWh,環比增長14.7%,同比增長9.7%。
    關鍵字: 動力電池 裝機量
    2019-10-15

    動力電池行業 固態電池能否取代鋰電池?

    在未來的發展中傳統鋰電池會被“洗”掉,而固態電池雖然由于種種困難不能實現量產,但它只需在時間里等待開花結果。
    關鍵字: 動力電池
    2019-10-14

    動力電池行業 產業化加速 造車新勢力“偏愛”固態電池

    固態電池作為下一代重要的新型技術路線之一,一直被寄予厚望。固態電池的新能源汽車商業化進程在持續加速。
    關鍵字: 固態電池
    2019-10-14
    電車資源2019年活動排期
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    東風俊風純電動物流車秒殺
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