B,N-Doped Activated Carbon-Based Electrodes from Potato Peels for Energy Storage Applications

IF 2.5 4区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Dr. Jan Willem Straten, Dr. Muhammad-Jamal Alhnidi, Ghassan Alchoumari, Krishna Sangam, Prof. Dr. Andrea Kruse
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Abstract

Potato peels (PPs) as waste biomass were selected as the biobased carbon source for this study, using urea as N precursor and boron trioxide as B precursor for the “in situ doping” via hydrothermal carbonization (HTC). During HTC, the feedstocks decompose over a wide range of complex chemical degradation mechanisms that finally form single B- and N- as well as B,N-co-doped hydrochars (HCs). Upon chemical ZnCl2 activation, the single B-doped activated carbon (AC) possessed a maximum B content of 0.2 wt%, whereas co-doped B,N-AC had the highest N content of 5.7 wt% with a B content of 0.1 wt%. The influence of single and B,N-co-doping on the physical-chemical material properties of the AC electrodes was analyzed and compared, in combination with its effect on the electrochemical performance for energy storage application. Compared to pristine AC derived from PPs, the B-doped and B,N-co-doped AC depicted increased electrical conductivity (EC) values of 50.3 S ⋅ m−1 and 34.0 S ⋅ m−1, respectively. In addition, the B,N-co-doped AC unveiled the highest average specific capacitances of 51.7 F ⋅ g−1 at 100 mV ⋅ s−1 and of 71.9 F ⋅ g−1 at 5 mV ⋅ s−1 outperforming the specific capacitance values of the reference material AC from peat.

Abstract Image

马铃薯皮B, n掺杂活性炭基储能电极。
本研究选择废生物质马铃薯皮(PPs)作为生物基碳源,以尿素为N前驱体,三氧化二硼为B前驱体,通过水热炭化(HTC)进行原位掺杂。在HTC过程中,原料通过广泛的复杂化学降解机制分解,最终形成单一的B-和N-以及B,N共掺杂的碳氢化合物(hc)。经ZnCl2化学活化后,单掺杂B活性炭(AC)的B含量最高为0.2 wt%,而共掺杂B,N-AC的N含量最高为5.7 wt%, B含量为0.1 wt%。分析比较了单掺杂和B、n共掺杂对交流电极材料物理化学性能的影响,并结合其对储能应用电化学性能的影响。与来自PPs的原始交流电相比,B掺杂和B、n共掺杂交流电的电导率(EC)值分别提高了50.3 S⋅m-1和34.0 S⋅m-1。此外,B、n共掺杂交流电在100 mV⋅s-1和5 mV⋅s-1下的平均比电容最高,分别为51.7 F⋅g-1和71.9 F⋅g-1,优于参考材料泥炭交流电的比电容值。
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来源期刊
ChemistryOpen
ChemistryOpen CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
4.80
自引率
4.30%
发文量
143
审稿时长
1 months
期刊介绍: ChemistryOpen is a multidisciplinary, gold-road open-access, international forum for the publication of outstanding Reviews, Full Papers, and Communications from all areas of chemistry and related fields. It is co-owned by 16 continental European Chemical Societies, who have banded together in the alliance called ChemPubSoc Europe for the purpose of publishing high-quality journals in the field of chemistry and its border disciplines. As some of the governments of the countries represented in ChemPubSoc Europe have strongly recommended that the research conducted with their funding is freely accessible for all readers (Open Access), ChemPubSoc Europe was concerned that no journal for which the ethical standards were monitored by a chemical society was available for such papers. ChemistryOpen fills this gap.
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