Starch Derived Porous Carbon Nanosheets for High-Performance Photovoltaic Capacitive Deionization
Starch Derived Porous Carbon Nanosheets for High-Performance Photovoltaic Capacitive Deionization
复制标题
用于高性能光伏电容去离子的淀粉衍生多孔碳纳米片
DOI：
10.1021/acs.est.7b01629
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发表时间：
2017
影响因子：
11.4
通讯作者：
Qiu Jieshan
中科院分区：
文献类型：
--
作者：
Wu Tingting;Wang Gang;Dong Qiang;Zhan Fei;Zhang Xu;Li Shaofeng;Qiao Huiying;Qiu Jieshan
电容去离子(CDI)是一种集储能和海水淡化于一体的新兴技术。本论文以淀粉为原料，通过简单的碳化和氢氧化钾活化，制备了比表面积高达2853m2/g的多孔碳纳米片，作为光伏CDI的电极材料。由PCNSS电极组成的电池在∼1.1V、500 mg/L的氯化钠溶液中表现出高的盐吸附量15.6 mg/g，以及高的充电效率和低的能耗。KOH活化在PCNSS优异的CDI性能中起着关键作用，它不仅在PCNSS表面形成了丰富的气孔，而且使其蓬松，提高了石墨化程度，有利于离子和电子的传输。PCNSs被认为是一种很有前途的CDI电极材料。太阳能电池和CDI的结合可能为降低CDI的能源成本和提高其商业竞争力提供一种新的途径。
Capacitive deionization (CDI) is an emerging technology that uniquely integrates energy storage and desalination. In this work, porous carbon nanosheets (PCNSs) with an ultrahigh specific surface area of 2853 m2/g were fabricated by the simple carbonization of starch followed by KOH activation for the electrode material of photovoltaic CDI. The CDI cell consisting of PCNSs electrodes exhibited a high salt adsorption capacity (SAC) of 15.6 mg/g at ∼1.1 V in 500 mg/L NaCl as well as high charge efficiency and low energy consumption. KOH activation played a key role in the excellent CDI performance as it not only created abundant pores on the surface of PCNSs but also made it fluffy and improved its graphitization degree, which are beneficial to the transport of ions and electrons. PCNSs are supposed to be a promising candidate for CDI electrode materials. The combination of solar cells and CDI may provide a new approach to reduce the energy cost of CDI and boost its commercial competitiveness.