储量丰富、成本低的新型电池系统引起了科学家的广泛关注。由于K
+能够可逆地嵌入/脱嵌石墨电极,开发了基于钾离子电解液(KPF
6)的新型双碳电池[碳微球(C)为正极材料,膨胀石墨(
![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmsubsup%3E%3Cmrow%3E%3Cmtext%3EC%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3Ey%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E%2A%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmath%3E)
)为负极材料],充电时总反应为:
![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmsubsup%3E%3Cmrow%3E%3Cmtext%3EC%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3Ey%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E%2A%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmath%3E)
+xK
++xC+
![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmtext%3Ex%3C%2Fmtext%3E%3Cmtext%3EP%3C%2Fmtext%3E%3Cmsubsup%3E%3Cmrow%3E%3Cmtext%3EF%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E6%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E-%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmath%3E)
=
![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmsub%3E%3Cmrow%3E%3Cmtext%3EK%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3Ex%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmsub%3E%3Cmsubsup%3E%3Cmrow%3E%3Cmtext%3EC%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3Ey%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E%2A%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmath%3E)
+xC(PF
6),如图所示。下列叙述错误的是( )
![](http://tikupic.21cnjy.com/2022/06/09/2c/01/2c0123c7d4ec6a68a8fd34727c1805c0_350x309.png)
- A、放电时,K+在电解液中由A极向B极迁移但并未嵌入碳微球中
- B、充电时,B极的电极反应式为xC(PF6)+xe-=xC+
![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmtext%3Ex%3C%2Fmtext%3E%3Cmtext%3EP%3C%2Fmtext%3E%3Cmsubsup%3E%3Cmrow%3E%3Cmtext%3EF%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E6%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E-%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmath%3E)
- C、放电时,每转移0.2mol电子时,电解液增重36.8g
- D、充放电过程中,
在碳微球电极上可逆地嵌入/脱嵌