Description
Date/Time: 04-03-2018 - Tuesday - 05:00 PM - 07:00 PM
Zijie Tang1 Zengxia Pei1 Chunyi Zhi1

1, City University of Hong Kong, Hong Kong, , Hong Kong

Rational architectural design of highly active and stable electrochemical materials is desirable for sustainable energy technologies but remains great challenges. Herein, inspired by inherent anisotropic structure for high-efficient ions transport in natural wood, we use basswood as precursor and present a low-tortuosity, multichannel, mesoporous carbon framework for both supercapacitor and oxygen reduction reaction (ORR) applications. With initial heteroatom embedment, followed by ammonia activation, surface functionalities, porous structures and specific surface areas of the wood carbons are simultaneously optimized. Accordingly, the as-prepared materials deliver a high specific capacitance (704 F g-1 at 0.2 A g-1) with an outstanding cycling stability (negligible decay after 10000 cycles) as self-supported supercapacitor electrodes. Simultaneously, the resultant wood carbons also exhibit superior ORR performance with a half-wave potential of 0.86 V (vs. reversible hydrogen electrode) in alkaline media, in conjunction with superb methanol cross-over tolerance and long-term stability, which then served as suitable and durable air-cathode catalysts for Zn-air battery. The results of this work open up new avenues for facile and rational design of structure-featured carbon materials from earth-abundant biomass for practical energy storage and conversion utilizations.

Meeting Program
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5:00 PM–7:00 PM Apr 3, 2018 (America - Denver)

PCC North, 300 Level, Exhibit Hall C-E