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Quasi-solid sodium ions electrolyte of $${\hbox {Na}}_{2} \hbox {O}{-} {\hbox {B}}_{2} {\hbox {O}}_{3}{-} {\hbox {SiO}}_{2} {-} {\hbox {H}}_{2} \hbox {O}$$Na2O-B2O3-SiO2-H2O system hydrated glass
Bulletin of Materials Science ( IF 1.8 ) Pub Date : 2020-02-18 , DOI: 10.1007/s12034-020-2050-7
Yingming Zhao , Fan Tong , Chenyao Fan , Siqi Yu , Bing Han , Jiayang Gao , Yunchao Lou , Penglin Jiang , Zhiyu Wang

$${\hbox {Na}}_{2}\hbox {O} {-} {\hbox {B}}_{2} {\hbox {O}}_{3}{-} {\hbox {SiO}}_{2}{-} {\hbox {H}}_{2} {\hbox {O}}$$ system hydrated glass with $$T_{\mathrm {g}}$$ ranges from $$-10 \hbox { to } 150^{\circ }$$C is synthesized by aqueous chemical methods and is applied to symmetrical cells as quasi-solid electrolyte. At the temperature around $$T_{\mathrm {g}}$$, the solid state transforms to quasi-solid state, whose mechanical property keeps like gel electrolyte, but the conductivity leaps from $$5.31 \times 10^{-6} \, {\hbox {S cm}}^{-1}$$ to $$5.43 \times 10^{-3} \, {\hbox {S cm}}^{-1}$$, much higher than most of the glass–ceramic electrolytes. As most of the solvated water is evaporated, $${\hbox {H}}_{2}{\hbox {O}}$$ left in the system distributes in the intervals as hydroxyl, which is much benefit to the ions transportation, and more important is to increase the voltage window to 2.24 V and even higher. The cycle performance is also researched. After 1000 circulations, there is still 65% capacity retention and no obvious damage is discovered in the electrolyte, which means much better cycle property of the electrolyte than gel electrolyte. Other compositions in the quasi-solid system including different contents of $${\hbox {B}}_{2}{\hbox {O}}_{3}$$, $${\hbox {Na}}_{2} {\hbox {SO}}_{4}$$ and m in sodium silicate $${\hbox {NaO}}_{2}{\cdot }{\hbox {mSiO}}_{2}$$ are also studied. In general, quasi-solid $${\hbox {Na}}_{2}\hbox {O} {-} {\hbox {B}}_{2}{\hbox {O}}_{3}{-} {\hbox {SiO}}_{2}{-} {\hbox {H}}_{2}{\hbox {O}}$$ system owns better conductivity and cycle performance than most glass–ceramic solid electrolyte, and it is environment-friendly, inexpensive and practical to be used as sodium ions quasi-solid electrolyte.

中文翻译:

$${\hbox {Na}}_{2} \hbox {O}{-} {\hbox {B}}_{2} {\hbox {O}}_{3}的准固态钠离子电解质{-} {\hbox {SiO}}_{2} {-} {\hbox {H}}_{2} \hbox {O}$$Na2O-B2O3-SiO2-H2O 系水合玻璃

$${\hbox {Na}}_{2}\hbox {O} {-} {\hbox {B}}_{2} {\hbox {O}}_{3}{-} {\hbox { SiO}}_{2}{-} {\hbox {H}}_{2} {\hbox {O}}$$ 系统水合玻璃 $$T_{\mathrm {g}}$$ 范围从 $$ -10 \hbox { to } 150^{\circ }$$C 是通过水性化学方法合成的,并作为准固体电解质应用于对称电池。在 $$T_{\mathrm {g}}$$ 附近的温度下,固态转变为准固态,其机械性能保持像凝胶电解质一样,但电导率从 $$5.31 \times 10^{-6} \, {\hbox {S cm}}^{-1}$$ 到 $$5.43 \times 10^{-3} \, {\hbox {S cm}}^{-1}$$,远高于大多数玻璃陶瓷电解质。由于大部分溶剂化水蒸发,系统中残留的 $${\hbox {H}}_{2}{\hbox {O}}$$ 以羟基的形式分布在间隔中,这对离子传输非常有利, 更重要的是将电压窗口增加到 2.24 V 甚至更高。还研究了循环性能。循环1000次后,仍有65%的容量保持率,电解液未发现明显损坏,这意味着电解液的循环性能比凝胶电解液好得多。准固体体系中的其他成分包括不同含量的$${\hbox {B}}_{2}{\hbox {O}}_{3}$$, $${\hbox {Na}}_{ 2} {\hbox {SO}}_{4}$$ 和 m 在硅酸钠 $${\hbox {NaO}}_{2}{\cdot }{\hbox {mSiO}}_{2}$$也在研究中。一般来说,准固体 $${\hbox {Na}}_{2}\hbox {O} {-} {\hbox {B}}_{2}{\hbox {O}}_{3}{3}{ -} {\hbox {SiO}}_{2}{-} {\hbox {H}}_{2}{\hbox {O}}$$ 系统比大多数玻璃陶瓷固体电解质具有更好的导电性和循环性能,而且是环保的,
更新日期:2020-02-18
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