MoO2@Cu@C Composites Prepared by Using Polyoxometalates@Metal-Organic Frameworks as Template for All-Solid-State Flexible Supercapacitor
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- 作者：Yidong Zhang ; Baoping Lin ; lbp@seu.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Ying Sun ; Pei Han ; Junchuan Wang ; Xiaojing Ding ; Xueqin Zhang ; Hong Yang
- 关键词：Metal-organic framework ; Flexible supercapacitor ; MoO2@Cu@C ; Pyrolysis ; Polyoxometalates
- 刊名：Electrochimica Acta
- 出版年：2016
- 出版时间：10 January 2016
- 年：2016
- 卷：188
- 期：Complete
- 页码：490-498
- 全文大小：3187 K
文摘
We have synthesized a composite of MoO2@Cu@CusingathermolysistemplateofPOM@MOFcrystal(POM = polyoxometalates, MOF = Metal–organic frameworks), in which the Keggin-type Mo-based POMs with negative charges exist as secondary building units of Cu-based MOF. In addition, the material is confirmed to exhibit an excellent capacity of 28.33 mAh g−1 at a current density of 1 A g−1, which is much higher than MoO2-based supercapacitors reported before. Moreover, we have fabricated a symmetrical flexible all-solid-state device with the MoO2@Cu@C electrode using PVA-KOH gel polymer as electrolyte and separator, and it shows outstanding sTable performance retaining 91% of its highest charge capacity maintained after 5000 cycles. The present study displayed a novel thermolysis template in the term of POM@MOF and provided an accessible foundation for investigations of MoO2-based supercapacitors.