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- 저자 : Cai Feipeng (검색결과 2 건)
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Chunhui Tan,Juhui Sa,Feipeng Cai,Bo Jiang,Gai Yang,Bo Wang,Jinhua Gao,Hua Chen,Xianzhong Qin 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.2
PtRu nanoparticles (NPs) supported on acid treated multiwall carbon nanotubes (Pt1Ru1/ MWCNTs) were prepared by a modified polyol method without adding any other surfactant or protective agent. The structural and compositional properties of the as-obtained samples were characterized by transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD) and X-ray photoelectron (XPS) spectroscopy. The electrocatalytic performance of the catalyst was evaluated by cyclic voltammetry (CV), CO stripping voltammetry and chronoamperometry, indicating a high catalytic activity, excellent CO tolerance and stability for methanol oxidation. Interestingly, a series of accurate controllable experiments have been designed to explore the enhancement mechanism of Pt1Ru1/MWCNTs for methanol oxidation reaction. Most importantly, Pt1Ru1/MWCNTs composites were used as an anode catalyst in the direct methanol fuel cells (DMFCs) exhibiting outstanding power density (126.1 mW/cm2) 1.7 times higher than that of the commercial catalyst of Pt1Ru1/C (74.1 mW/cm2Þ)(E-TEK).
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Liu Junjie,Chu Chenxiao,Qin Xianzhong,Meng Weisong,Xu Xinrui,Wang Bo,Cai Feipeng 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.3
High nickel ternary cathode materials (Ni ≥ 90%) have great potential for application as power batteries in electric vehicles and have become a hot spot for research on cathode materials. However, the residual Li on the surface of the high Ni ternary cathode materials prepared by solid-phase sintering is one of the main reasons affecting their electrochemical performance. It is found that Li1 + x(Ni0.9Co0.05Mn0.05)1-xO2 with x = 0.3, which has a discharge-specific capacity of 205.74 mAh g −1 at 2.7–4.3 V, 0.1C and 184.1 mAh g −1 at 1 C, retained 89% of its initial discharge capacity after 100 cycles at 1 C. The discharge-specifi c capacity at 10 C was 153.14 mAh g −1. In addition, the Li residue of NCM90-1.03 was 17,189.959 ppm, and the total alkalinity was 4196.896 ppm. The results by X-ray diff raction (XRD) and scanning electron microscope (SEM) showed that when the Li excess was 0.3%, it was possible to obtain uniform particle size, a wider Li layer, and reduced cation mixing. Therefore, choosing the right amount of excess Li can stimulate the application prospect of NCM90 in new energy vehicles.
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