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一种在聚吡咯/还原氧化石墨烯上制备用于高比电容超级电容器的镍钴层状双氢氧化物逐层组装复合材料的简单策略。

A simple strategy to prepare a layer-by-layer assembled composite of Ni-Co LDHs on polypyrrole/rGO for a high specific capacitance supercapacitor.

作者信息

Kulandaivalu Shalini, Hussein Mohd Zobir, Mohamad Jaafar Adila, Mohd Abdah Muhammad Amirul Aizat, Azman Nur Hawa Nabilah, Sulaiman Yusran

机构信息

Department of Chemistry, Faculty of Science, Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia

Materials Synthesis and Characterization Laboratory (MSCL), Institute of Advanced Technology (ITMA), Universiti Putra Malaysia 43400 Serdang Selangor Malaysia.

出版信息

RSC Adv. 2019 Dec 6;9(69):40478-40486. doi: 10.1039/c9ra08134h. eCollection 2019 Dec 3.

DOI:10.1039/c9ra08134h
PMID:35542630
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9076277/
Abstract

A facile and novel electrode material of nickel-cobalt layered double hydroxides (Ni-Co LDHs) layered on polypyrrole/reduced graphene oxide (PPy/rGO) is fabricated for a symmetrical supercapacitor chemical polymerization, hydrothermal and vacuum filtration. This conscientiously layered composition is free from any binder or surfactants which is highly favorable for supercapacitors. The PPy/rGO serves as an ideal backbone for Ni-Co LDHs to form a free-standing electrode for a high-performance supercapacitor and enhanced the overall structural stability of the film. The well-designed layered nanostructures and high electrochemical activity from the hexagonal-flakes like Ni-Co LDHs provide large electroactive sites for the charge storage process. The specific capacitance (1018 F g at 10 mV s) and specific energy (46.5 W h kg at 464.9 W kg) obtained for the PPy/rGO|Ni-Co LDHs symmetrical electrode in the current study are the best reported for the two-electrode system for PPy- and LDHs-based composites. The outstanding performance in the prepared LBL film is a result of the LBL architecture of the film and the combined effect of redox reaction and electrical double layer capacitance.

摘要

通过化学聚合、水热和真空过滤法制备了一种新颖且简便的电极材料，即负载在聚吡咯/还原氧化石墨烯（PPy/rGO）上的镍钴层状双氢氧化物（Ni-Co LDHs），用于对称超级电容器。这种精心设计的层状结构不含任何对超级电容器极为有利的粘合剂或表面活性剂。PPy/rGO作为Ni-Co LDHs的理想骨架，形成了用于高性能超级电容器的独立电极，并增强了薄膜的整体结构稳定性。精心设计的层状纳米结构以及六方片状Ni-Co LDHs的高电化学活性为电荷存储过程提供了大量电活性位点。在当前研究中，PPy/rGO|Ni-Co LDHs对称电极获得的比电容（在10 mV s时为1018 F g）和比能量（在464.9 W kg时为46.5 W h kg）是基于PPy和LDHs的复合材料双电极系统中报道的最佳结果。所制备的层层组装（LBL）薄膜的优异性能是薄膜的LBL结构以及氧化还原反应和双电层电容共同作用的结果。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/c9064a9e66dc/c9ra08134h-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/10084d23a890/c9ra08134h-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/0b8640ef29de/c9ra08134h-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/7ee0b81c398a/c9ra08134h-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/95a9fa180269/c9ra08134h-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/d231a1976d0a/c9ra08134h-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/c9064a9e66dc/c9ra08134h-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/10084d23a890/c9ra08134h-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/2cf699bb3c72/c9ra08134h-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/894536f89289/c9ra08134h-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/0b8640ef29de/c9ra08134h-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/7ee0b81c398a/c9ra08134h-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/95a9fa180269/c9ra08134h-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/d231a1976d0a/c9ra08134h-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dae5/9076277/c9064a9e66dc/c9ra08134h-f8.jpg

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