An Effective Strategy to Synthesize Well-Designed Activated Carbon Derived from Coal-Based Carbon Dots via Oxidation before Activation with a Low KOH Content as Supercapacitor Electrodes

超级电容器 活性炭 碳纤维 材料科学 比表面积 化学工程 电化学 电解质 电容 纳米技术 电极 化学 吸附 有机化学 复合材料 催化作用 复合数 物理化学 工程类
作者
Yaojie Zhang,Jianbo Jia,Yue Sun,Bing Xu,Zhendong Jiang,Xiaoxiao Qu,Chuanxiang Zhang
出处
期刊:Nanomaterials [Multidisciplinary Digital Publishing Institute]
卷期号:13 (22): 2909-2909 被引量:7
标识
DOI:10.3390/nano13222909
摘要

The development of coal-based activated carbon for supercapacitors provides a robust and effective approach toward the clean and efficient use of coal, and it also offers high-quality and low-cost raw materials for energy storage devices. However, the one-step activation method for preparing coal-based activated carbon has problems, such as difficulty in introducing surface-functional groups and high KOH dosage. In our work, activated carbon was prepared through an effective strategy of oxidation and KOH activation with a low KOH content by employing coal-based carbon dots as raw material. The influence of temperature during the KOH activation of carbon dots on a specific surface area, pore structure, and various quantities and types of surface-functional groups, as well as on the electrochemical performance of supercapacitors, was systematically studied. The as-prepared sample, with the alkali–carbon ratio of 0.75, processes a large specific surface area (1207 m2 g−1) and abundant surface-functional groups, which may provide enormous active sites and high wettability, thus bringing in high specific capacitance and boosted electrochemical performances. The oxygen and nitrogen content of the activated carbon decreases while the carbon content increases, and the activation temperature also increases. The as-prepared activated carbon reaches the highest specific capacitance of 202.2 F g−1 in a 6 M KOH electrolyte at a current density of 10 A g−1. This study provides new insight into the design of high-performance activated carbon and new avenues for the application of coal-based carbon dots.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
大菠萝是什么味完成签到,获得积分10
1秒前
2秒前
tianshanfeihe完成签到,获得积分10
3秒前
科研通AI5应助小马sad采纳,获得10
3秒前
东西南北完成签到,获得积分10
5秒前
大方的荟完成签到,获得积分10
6秒前
Lh发布了新的文献求助10
7秒前
7秒前
19205100313应助YZYXR采纳,获得10
7秒前
min完成签到,获得积分10
8秒前
aikeyan完成签到 ,获得积分10
8秒前
科研通AI2S应助猪猪hero采纳,获得10
9秒前
pluto完成签到,获得积分0
10秒前
ding应助zws采纳,获得10
10秒前
11秒前
11秒前
12秒前
hugh发布了新的文献求助10
13秒前
扁桃体永不发炎完成签到 ,获得积分10
15秒前
15秒前
十三完成签到 ,获得积分10
15秒前
brwen发布了新的文献求助10
16秒前
领导范儿应助IvyLee采纳,获得10
17秒前
猪猪hero发布了新的文献求助10
18秒前
呋喃发布了新的文献求助10
18秒前
19秒前
gishisei完成签到,获得积分10
19秒前
20秒前
1111完成签到,获得积分10
21秒前
健壮念寒发布了新的文献求助10
21秒前
微笑完成签到,获得积分20
22秒前
火火火小朋友完成签到 ,获得积分10
22秒前
nino完成签到,获得积分0
24秒前
细心青烟发布了新的文献求助10
26秒前
Akim应助Synan采纳,获得10
27秒前
幻幻完成签到 ,获得积分10
27秒前
27秒前
29秒前
追佩奇十条街完成签到,获得积分10
29秒前
30秒前
高分求助中
All the Birds of the World 4000
Production Logging: Theoretical and Interpretive Elements 3000
Animal Physiology 2000
Les Mantodea de Guyane Insecta, Polyneoptera 2000
Am Rande der Geschichte : mein Leben in China / Ruth Weiss 1500
CENTRAL BOOKS: A BRIEF HISTORY 1939 TO 1999 by Dave Cope 1000
Machine Learning Methods in Geoscience 1000
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 物理 生物化学 纳米技术 计算机科学 化学工程 内科学 复合材料 物理化学 电极 遗传学 量子力学 基因 冶金 催化作用
热门帖子
关注 科研通微信公众号,转发送积分 3740101
求助须知:如何正确求助?哪些是违规求助? 3283046
关于积分的说明 10033642
捐赠科研通 2999934
什么是DOI,文献DOI怎么找? 1646216
邀请新用户注册赠送积分活动 783427
科研通“疑难数据库(出版商)”最低求助积分说明 750374