Hewei Song , Thanh Tuan Nguyen , Rongrong Chu , Yanqun Bai , Nam Hoon Kim , Joong Hee Lee
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引用次数: 0
Abstract
The cathodic host for practical lithium sulfur (Li–S) batteries needs to meet numerous requirements, such as outstanding electron conductivity, desirable lithium polysulfide (LiPSs) adsorption ability, and efficient catalytic effect towards the redox of sulfur. Given the above considerations, an N, P, S tri-doped 3D interconnected porous carbon embedded with heterogeneous ruthenium phosphides (RuP2-RuP@NPSC) was constructed to serve as a sulfur host for high-performance and practical Li–S battery. Strong interfacial coupling effect in the RuP2-RuP heterojunctions endowed the active sites with favorable LiPSs adsorption ability and boosted sulfur reduction reaction. The density functional theory calculation suggested that the electronic tuning of the constructed heterojunction interface could enhance the electron transport and LiPSs adsorption ability. The higher current response of symmetric cells, larger Li2S deposition and dissolution capacity of RuP2-RuP@NPSC in comparison to other counterparts of RuP@NPSC, RuP2@NPSC, and NPSC further verified the great catalytic capability of RuP2-RuP heterojunctions. As a result, corresponding cells with RuP2-RuP@NPSC/S electrodes delivered an impressive reversible capacity of 565 mAh g−1 at 6 C, and an ultralow capacity decay rate of 0.019 % per cycle after 1000 cycles was achieved at the current of 2 C. The commercial level high sulfur loading pouch cells further confirmed the feasibility and practicability of RuP2-RuP@NPSC/S based Li–S battery
期刊介绍:
Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem.
Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.