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求翻譯達人翻譯一個摘要----若覺得BB少了我可以加!
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Abstract 如下: A process was attempted to improve the performance of natural graphite for lithium ion batteries (LIB). The natural graphite was treated in a concentrated sulfuric acid solution at high temperature, followed by the coating of resorcinol-formaldehyde resin using in situ polymerization and heat-treatment over 800℃. SEM, XRD, XPS and Raman spectroscopy were employed to investigate the samples. It was found that the sharp edges as well as other active sites ‘‘were repaired’’ and the thin pyrolytic carbon film coated on the surface of graphite led to the decrease of BET surface areas of coated graphite and depressed decomposition of electrolyte and co-intercalation of solvated ions, which led to an improved electrochemical performance of modified graphite. In fact, the modified natural graphite reached 90.3% of the initial coulombic efficiency, more than 350 mAh g -1 of the reversible capacity and 96.4% of the charge capacity retention reached after 70 cycles. The results show that the proposed process is a promising and practicable way to improve natural graphite for LIB. 若是用翻譯工具的就算了---- |
» 搶金幣啦!回帖就可以得到:
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| 嘗試提出了一個提升用于鋰離子電池的天然石墨性能的工藝。高溫下,在濃硫酸中處理這種天然石墨,然后通過原位聚合方式用間苯二酚甲醛樹脂包覆并在800℃以上進行熱處理。利用SEM, XRD, XPS和拉曼光譜手段研究了這種樣品。研究發(fā)現(xiàn),材料的鋒邊和其它活性位點被“修復(fù)”, 包覆在石墨表面的熱裂解碳薄層導(dǎo)致了包覆石墨的BET表面積的減少以及抑制了電解質(zhì)的沉積和溶劑化離子的共插作用,從而導(dǎo)致了修飾后的石墨的電化學(xué)特性的提升。事實上,這種經(jīng)修飾的天然石墨達到了90.3%的初次充放電效能, the modified natural graphite reached 90.3% of the initial coulombic efficiency, 獲得超過350 mAh g -1的可逆電容以及經(jīng)過70次充放電后仍保有96.4%充電容量。這些研究結(jié)果所提到的工藝是一種改善用于鋰電池的天然石墨性能的有前景且切實可行的途徑。 |
| 嘗試提出了一個提升用于鋰離子電池的天然石墨性能的工藝。高溫下,在濃硫酸中處理這種天然石墨,然后通過原位聚合方式用間苯二酚甲醛樹脂包覆并在800℃以上進行熱處理。利用SEM, XRD, XPS和拉曼光譜手段研究了這種樣品。研究發(fā)現(xiàn),材料的鋒邊和其它活性位點被“修復(fù)”, 包覆在石墨表面的熱裂解碳薄層導(dǎo)致了包覆石墨的BET表面積的減少以及抑制了電解質(zhì)的沉積和溶劑化離子的共插作用,從而導(dǎo)致了修飾后的石墨的電化學(xué)特性的提升。事實上,這種經(jīng)修飾的天然石墨達到了90.3%的初次充放電效能,可 獲得超過350 mAh g -1的可逆電容以及經(jīng)過70次充放電后仍保有96.4%充電容量。這些研究結(jié)果所提到的工藝是一種改善用于鋰電池的天然石墨性能的有前景且切實可行的途徑。 |
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