气候变化领域集成服务门户(CCPortal): Ultralong cycle life and outstanding capacitive performance of a 10.8 v metal free micro-supercapacitor with highly conducting and robust laser-irradiated graphene for an integrated storage device

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DOI	10.1039/c9ee01458f
	Ultralong cycle life and outstanding capacitive performance of a 10.8 v metal free micro-supercapacitor with highly conducting and robust laser-irradiated graphene for an integrated storage device
	Kamboj N.; Purkait T.; Das M.; Sarkar S.; Hazra K.S.; Dey R.S.
发表日期	2019
ISSN	17545692
起始页码	2507
结束页码	2517
卷号	12 期号:8
英文摘要	Interconnected porous graphene plays a crucial role as supercapacitive material as well as a current collector in developing metal free microsupercapacitor (MSC) because of its unique structure and superior conductivity. Electrochemical reduction followed by use of a laser irradiation method shows advances for the fabrication of the conductive graphene-based robust device. Use of Raman spectra proves that the laser irradiation method is capable of healing the defects with fused interconnected sheets, as a result, high conductivity and improved crystallinity of the laser irradiated graphene (LIG) sample is achieved. The LIG film on a flexible substrate was patterned with the aim to develop an on-chip flexible MSC, which offers a large working voltage of 1.2 V in an aqueous solid electrolyte. Interestingly, the MSC, without any metal current collector, shows a unique electrical-double layer behavior and unprecedented cycling stability. It is worth noting that the retention of the initial capacitance after 100:000 continuous cycles was 100%. A large cell voltage of 10.8 V was realized by modularizing the array of devices without much degradation of the rectangular shapes of the voltammogram even at higher scan rates (100 V s-1). The array of LIG-MSC was integrated with a commercial solar cell module for hybrid energy harvesting and as a storage device. This study provides an effective strategy to build a metal free supercapacitor with exceptional cycle life and facilitates progress towards self-sustainable energy in the future. © The Royal Society of Chemistry 2019.
英文关键词	Capacitance; Crystallinity; Electric current collectors; Electrolytic reduction; Energy harvesting; Graphene; Integrated circuit interconnects; Irradiation; Metals; Solid electrolytes; Supercapacitor; Virtual storage; Capacitive performance; Electrical double layers; Electrochemical reductions; Flexible substrate; Integrated storage; Irradiation methods; Micro supercapacitors; Rectangular shapes; Graphene devices; carbon; electrical conductivity; electrolyte; electronic equipment; irradiation; laser; nanoparticle
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189855
作者单位	Institute of Nano Science and Technology (INST), Mohali, Punjab, 160064, India
推荐引用方式 GB/T 7714	Kamboj N.,Purkait T.,Das M.,et al. Ultralong cycle life and outstanding capacitive performance of a 10.8 v metal free micro-supercapacitor with highly conducting and robust laser-irradiated graphene for an integrated storage device[J],2019,12(8).
APA	Kamboj N.,Purkait T.,Das M.,Sarkar S.,Hazra K.S.,&Dey R.S..(2019).Ultralong cycle life and outstanding capacitive performance of a 10.8 v metal free micro-supercapacitor with highly conducting and robust laser-irradiated graphene for an integrated storage device.Energy & Environmental Science,12(8).
MLA	Kamboj N.,et al."Ultralong cycle life and outstanding capacitive performance of a 10.8 v metal free micro-supercapacitor with highly conducting and robust laser-irradiated graphene for an integrated storage device".Energy & Environmental Science 12.8(2019).