Integrated nano-porous cobalt oxide/dicobalt phosphide hybrid material, preparation and energy storage application
A nanoporous, hybrid material technology, applied in electrolytic inorganic material coating, electrical components, battery electrodes, etc., can solve the problem of poor battery cycle stability and rate performance, difficult to maintain stable electrode material structure, difficult to inhibit active material pulverization , gathering and even detaching from current collectors
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Embodiment 1
[0026] Example 1: At room temperature, using a three-electrode system, Co-Co with a thickness of 15 μm 2 P alloy bar (Co 85 P 15 ) is the working electrode, the silver / silver chloride electrode is the reference electrode, and the carbon glass sheet is the counter electrode. –1 Electrochemical corrosion was carried out using an electrochemical workstation in NaCl solution with a working current density of 10mA cm –2 , the corrosion curve as figure 1 Shown in (A). The raw material consists of Co and Co 2 P composition ( figure 1 Middle (B)), metallic Co is more electrochemically active and preferentially dissolved in electrochemical corrosion. The alloy foil corroded to point a was cleaned with deionized water, soaked and fully dried in a vacuum oven, which was designated as sample 1. By its XRD spectrum (see figure 1 In (B)), it can be seen that the main phase is Co 2 P; from its microstructure photo (see image 3 In (a) and Figure 4 In (a) and (b)), it can be seen ...
Embodiment 2
[0027] Example 2: At room temperature, using a three-electrode system, Co-Co with a thickness of 15 μm 2 P alloy bar (Co 85 P 15 ) is the working electrode, the silver / silver chloride electrode is the reference electrode, and the carbon glass sheet is the counter electrode. –1 Electrochemical dealloying was carried out using an electrochemical workstation in a NaCl solution with a working current density of 10mA cm –2 . Such as figure 1 As shown in the corrosion curve in (A), the alloy foil corroded to point b was cleaned with deionized water to remove the sodium chloride particles attached to the surface and pores of the material, and fully dried in a vacuum oven, which was recorded as sample 2 . according to image 3 In the photo of the microstructure in (b), the ligament structure of sample 2 is more complete, the width distribution is mainly in the range of 22-26 nm, and the ligament gap (that is, the pore size) is mainly distributed in the range of 7-14 nm.
Embodiment 3
[0028] Example 3: At room temperature, using a three-electrode system, Co-Co with a thickness of 15 μm 2 P alloy bar (Co 85 P 15 ) is the working electrode, the silver / silver chloride electrode is the reference electrode, and the carbon glass sheet is the counter electrode. –1 Electrochemical dealloying was carried out using an electrochemical workstation in a NaCl solution with a working current density of 10mA cm –2 . Such as figure 1 As shown in (A) corrosion curve, the sample corroded to point c was cleaned with deionized water, fully dried in a vacuum oven, and recorded as sample 3. according to figure 1 The XRD spectrum in (B) and Figure 4 HR-TEM photo of (d), the main phase of sample 3 is Co 2 P, the interplanar spacing is also the same as that of Co 2 The (112) crystal plane of P matches; according to figure 2 The pore size distribution diagram, the pore size is mainly distributed in 5 ~ 15nm; according to image 3 middle (c), Figure 4 In the microstructu...
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