Preparation method of Cu3P nanowire negative electrode, Cu3P nanowire negative electrode prepared by method and application of Cu3P nanowire negative electrode

A nanowire and negative electrode technology, applied in the field of energy devices, can solve the problem of insufficient sodium-ion batteries, and achieve the effects of good electron/ion fast transport channels, good structural integrity, excellent rate performance and cycle stability.

Active Publication Date: 2016-08-10
SUZHOU UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Recently, metal phosphides have been proposed as potential anode materials for Na-ion batteries because of their higher specific capacitance relative to carbonaceous materials; however, most metal phosphides exhibit only limited cycling stability, usually their cycle 30~150 times, which is obviously not enough for sodium-ion batteries, it is necessary to improve its preparation method and final morphology

Method used

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  • Preparation method of Cu3P nanowire negative electrode, Cu3P nanowire negative electrode prepared by method and application of Cu3P nanowire negative electrode
  • Preparation method of Cu3P nanowire negative electrode, Cu3P nanowire negative electrode prepared by method and application of Cu3P nanowire negative electrode
  • Preparation method of Cu3P nanowire negative electrode, Cu3P nanowire negative electrode prepared by method and application of Cu3P nanowire negative electrode

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Embodiment 1

[0050] This embodiment provides a Cu 3 The preparation method of P nanowire negative electrode material, it comprises the following steps:

[0051] (a) Copper foil (1 cm 2 ) to remove impurities on the surface (washed several times with hydrochloric acid and deionized water successively), and then immerse one side of it in a mixed aqueous solution (45ml) of ammonium persulfate (5mmol) and sodium hydroxide (0.1mol) at room temperature for 10min , taken out from the solution, washed with deionized water several times (3-5 times) and dried in a blast drying oven at 60°C to obtain copper hydroxide nanowires grown on one side of the copper foil substrate;

[0052] (b) Place excess sodium hypophosphite in the middle of the tube furnace, pass argon gas into the tube furnace for 15 minutes, and then heat the middle of the tube furnace to 350°C, and at the same time form copper hydroxide on the surface of one side The copper foil of the nanowire is placed downstream of the sodium hyp...

Embodiment 2

[0054] This embodiment provides a Cu 3 The preparation method of the P nanowire negative electrode material is basically the same as that in Example 1, except that the size of the copper foil is 6.5×10.5 cm 2 , image 3 For the prepared Cu 3 Comparison of optical pictures of P nanowire anode material (abbreviated as C-2) before and after reaction.

Embodiment 3

[0056] This embodiment provides a Cu 3 The preparation method of the P nanowire negative electrode material is basically the same as that in Example 1, except that the reaction time of the copper foil in the mixed aqueous solution is 30 minutes and 50 minutes respectively. Figure 4 and Figure 5 respectively prepared Cu 3 FESEM images of P nanowire anode materials (abbreviated as C-3 and C-4, respectively). Depend on Figure 4 It can be seen that the average width of C-3 is about 300-500 nm, and the average length is about 12 μm. Figure 5 It can be seen that the average length of C-4 is about 20 μm.

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Abstract

The invention relates to a preparation method of a Cu3P nanowire negative electrode, the Cu3P nanowire negative electrode prepared by the method and an application of the Cu3P nanowire negative electrode. The method comprises the following steps: (a) immersing one surface of a copper foil into a mixed water solution of persulfate and hydroxide for reaction, and forming a copper hydroxide nanowire in one side surface of the copper foil; and (b) putting excessive hypophosphite into the middle part of a tube furnace, putting the copper foil formed with the copper hydroxide nanowire in one side surface into the downstream part, discharging air in the tube furnace by an inert gas, then heating the air and reacting a generated hydrogen phosphide gas and the copper foil formed with the copper hydroxide nanowire in one side surface under a low-temperature condition to obtain a Cu3P nanowire negative electrode material in in-situ, unilateral and massive growth on the basis of a copper foil base. The material can be directly used as the negative electrode material for sodium-ion half-batteries and all-batteries. The processing steps are simple; the cost is relatively low; and enlarged production and large-scale promotion are facilitated.

Description

technical field [0001] The invention belongs to the field of energy devices and relates to a Cu 3 P nanowire negative electrode material, specifically relates to a kind of Cu 3 Preparation method of P nanowire negative electrode, Cu prepared by the method 3 P nanowire negative electrode and its application. Background technique [0002] Sodium-ion batteries have attracted a lot of attention as potential candidates for energy storage systems due to the abundance and low cost of sodium. Compared with lithium-ion batteries, sodium-ion batteries face many challenges in the early stages of their development, including low specific energy, poor cycle performance, and low power density. As the main component of sodium-ion batteries, anode materials play an important role in the overall electrochemical performance of sodium-ion batteries. Recently, metal phosphides have been proposed as potential anode materials for Na-ion batteries because of their higher specific capacitance r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/136H01M4/1397H01M10/054
CPCH01M4/136H01M4/1397H01M4/5805H01M10/054Y02E60/10
Inventor 陈煜范谋平
Owner SUZHOU UNIV
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