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High Performance Lithium Secondary Batteries Based on Novel Ni3Co6S8@C Core—Shell Nanoparticle

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As one new type of cathode materials, transition metal sulfides with the advantages of high energy density and high electronic conductivity have attracted a lot of attentions to fulfill the demands of high power and energy battery applications in hybrid electric vehicles (HEVs) and electric vehicles (EVs). Herein, we report the synthesis of one novel ternary sulfide of Ni3Co6S8@C urchin-like core—shell nanoparticles as cathode materials for lithium secondary batteries with sodium alginate as the binder and lithium foil as the anode. The novel Ni3Co6S8@C nanoparticles show high discharge specific capacity, excellent cycling stability and much better rate capability. Based on the overall mass of the Ni3Co6S8@C nanoparticles, it could achieve an initial energy density of 957 Wh kg-1, and a respective energy density of 606 and 508 Wh kg-1 after 100 and 200 cycles. The outstanding performance of the Ni3Co6S8@C electrode could be attributed to the carbon coating and sodium alginate binder, because these strategies could significantly inhibit the volume change, aggregation and pulverization of Ni3Co6S8@C nanoparticles.
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Keywords: Cathode Material; Lithium Secondary Battery; [email protected] Core—Shell Nanoparticle; Ternary Sulfide

Document Type: Research Article

Affiliations: 1: Qingdao Key Laboratory of Solar Energy Utilization and Energy Storage Technology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao 266101, China 2: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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