CuS quantum dot modified carbon aerogel as an immobilizer for lithium polysulfides for high-performance lithium–sulfur batteries

Abstract

CuS quantum dot (QD) modified carbon aerogels were successfully prepared via a facile and scalable method to encapsulate sulfur and polysulfides into the hierarchical porous channel of lithium–sulfur batteries.

The Research Development of Quantum Dots in Electrochemical Energy Storage

“…Carbon aerogel is a suitable carbon material having a unique hierarchical structure with a novel 3D framework and high conductivity. Li et al successfully prepared CuS QD‐modified carbon aerogels by encapsulating sulfur and polysulfides into the hierarchical porous channels of LSBs. The composite effectively enhanced the electrochemical performance of the sulfur cathode to offer effective possible route for the development of high‐performance LSBs.…”

Fe3O4 nanoparticles decorated on a CuS platelet-based sphere: a popcorn chicken-like heterostructure as an ideal material against electromagnetic pollution

“…Copper sulfide (CuS), an important semiconductor transition-metal chalcogenide with unique electronic properties, is a perspective material with wide application in the fields of sensing, 25 imaging, 26 hydrogen storage, 27 lithium-ion batteries, 28 etc. To date, a variety of CuS structures such as 0D nanoparticles, 29 1D nanotubes, 25 nanowires, 30 2D nanoplates, 31 and 3D porous hollow flowers 32 have been fabricated.…”

Molecular-Level CuS@S Hybrid Nanosheets Constructed by Mineral Chemistry for Energy Storage Systems

“…XPS measurements are employed to obtain the information on the surface elements and valence states of the as-prepared CuS@S. As shown in Figure S4, the signals of Cu, S, and O elements are displayed in the survey spectrum. 11,14,42 The existence of the O element may derive from the air, which is adsorbed on the surface of the sample.…”

“…The disappearance of the sulfur peak will be explained in detail by the following SEM images. XPS measurements are employed to obtain the information on the surface elements and valence states of the as-prepared CuS@S. As shown in Figure S4, the signals of Cu, S, and O elements are displayed in the survey spectrum. ,, The existence of the O element may derive from the air, which is adsorbed on the surface of the sample. For the Cu 2p peaks (Figure d), the high-resolution XPS spectrum of the Cu 2p 3/2 peaks are centered at 932.7 and 933.8 eV through a Gaussian fitting method, and the peaks at 952.5 and 953.9 eV are assigned to Cu 2p 1/2 .…”

“…To pursue an improved greener environment, the applicable materials and fabricating manner should be effectively explored. Recently, typical transition-metal chalcogenides, containing CoS, NiS, and MoS 2 , have attracted much attention owing to their promising energy-storage prospects. − Among them, copper sulfide (CuS) exhibits fascinating electrochemical performance with a high theoretical capacity (560 mA h g –1 ) and good electrical conductivity (10 –3 S cm –1 ). − Nonetheless, serious capacity fading on multiple cycling of the CuS-based materials, mainly resulting from the destruction of structure and the “shuttling effect” of reactive polysulfide intermediates, inevitably restricts its extensive application in energy storage systems.…”