Lithium ion battery and preparation method of nickel oxide-nickel-nickel oxide nanotube array

A nanotube array and lithium-ion battery technology, applied in the field of lithium-ion batteries, can solve the problems of reduced production efficiency, increased production cost, battery system power, rate and cycle performance deterioration, to reduce interface contact resistance and improve utilization rate , the effect of improving the efficiency of electrochemical reaction

Inactive Publication Date: 2020-02-28
JILIN JIANZHU UNIVERSITY
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  • Description
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Problems solved by technology

However, the introduction of polymer binders leads to an increase in the contact resistance between the active material particles and between the active material particles and the current collector, which deteriorates the power, rate and cycle performance of the battery system.
In addition, most metal / oxide composite electrodes involve complex preparation processes, resulting in reduced production efficiency and increased production costs

Method used

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preparation example Construction

[0034] The invention provides a method for preparing a nickel oxide-nickel-nickel oxide nanotube array with a sandwich structure. The nickel nanotube array is prepared on a nickel foil by electrochemical deposition and electrochemical corrosion techniques, and then annealed.

[0035] Specifically, see figure 1 , the preparation method of nickel oxide-nickel-nickel oxide nanotube array according to one embodiment of the present invention, comprises the following steps:

[0036] Step 1. Electrochemical deposition of Ni on nickel foil (a) x Cu 100-x Alloy film (b), wherein x=30~80;

[0037] Step 2, to the Ni x Cu 100-x The alloy film is dealloyed to obtain a nickel film with an oxide film on the surface;

[0038] Step 3, soaking the nickel film in an acidic aqueous solution to remove the oxide film on the surface of the nickel film;

[0039] Step 4, heating the nickel film treated in step 3 at 30-80° C. for 5-10 hours to obtain the nickel nanotube array (c);

[0040] Step ...

Embodiment 1

[0060] One, prepare nickel oxide-nickel-nickel oxide nanotube array according to the following method:

[0061] (1) Electrochemical deposition of nickel-copper alloy film on a clean nickel foil (2cm×2cm, 15μm thick), electrochemical deposition conditions: current density is -4.5mA cm -2 , the time is 10min, the solution contains 1M NiSO 4 , 0.05M CuSO 4 and 0.5M H 3 BO 3 (pH value is adjusted to be 4), the ratio of Ni:Cu:B is 20:1:10, uses two electrode system, and wherein nickel foil and platinum sheet are respectively working electrode and counter electrode;

[0062] (2) The alloy film obtained by electrochemical deposition was in the same solution at 0.5V (relative to Li + / Li) under dealloying, the time is 5min;

[0063] (3) Soak the nickel film after the dealloying that step (2) obtains in 1M hydrochloric acid solution for 15min, remove the surface oxide film, then clean it up with deionized water;

[0064] (4) heating the nickel film obtained in step (3) at 60° C. ...

Embodiment 2

[0081] Nickel oxide-nickel-nickel oxide nanotube arrays were prepared as follows:

[0082] (1) Electrochemical deposition of nickel-copper alloy film on a clean nickel foil (2cm×2cm, 15μm thick), electrochemical deposition conditions: current density is -1mA cm -2 , the time is 30min, the solution contains 5M NiSO 4 , 0.25M CuSO 4 and 2.5M H 3 BO 3 (pH value is adjusted to be 2), the ratio of Ni:Cu:B is 20:1:10, uses two electrode systems, and wherein nickel foil and platinum sheet are respectively working electrode and counter electrode;

[0083] (2) Dealloying the alloy film obtained by electrochemical deposition in the same solution at 1V (relative to Li+ / Li) for 3min;

[0084] (3) soak the nickel film after the dealloying that step (2) obtains in 0.5M hydrochloric acid solution for 20min, remove surface oxide film, then clean up with deionized water;

[0085](4) heating the nickel film obtained in step (3) at 30° C. for 10 h in a vacuum oven to obtain a nickel nanotub...

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Abstract

The invention relates to a lithium ion battery and a preparation method of a nickel oxide-nickel-nickel oxide nanotube array. The lithium ion battery comprises a nickel nanotube array composite electrode, and the nickel nanotube array composite electrode is prepared from the nickel oxide-nickel-nickel oxide nanotube array. The lithium ion battery comprises the nickel nanotube array composite electrode with the nickel oxide-nickel-nickel oxide sandwich structure, so transmission of electrons and electrolyte ions of an electrode system in the lithium ion battery can be enhanced, and excellent rate capability and cycling stability are obtained while high specific capacity is ensured.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a lithium ion battery comprising a nickel oxide-nickel-nickel oxide nanotube array. Background technique [0002] The rapid development and popularization of portable smart wearable electronic devices and electric vehicles have put forward higher requirements on the energy density, power density, rate performance and cycle stability of the supporting energy storage devices. [0003] Lithium-ion batteries are considered as a promising energy storage device due to their high energy density. Among the electrode energy storage materials of lithium-ion batteries, carbon materials cannot meet the demand for high energy due to their low theoretical capacity; while transition metal oxides with higher theoretical capacities have inherently poor electron and ion transport properties. Its practical capacity and application are limited. Traditional planar electrodes usually adopt the method of coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/525H01M10/0525B81B7/04B81C1/00
CPCH01M4/362H01M4/525H01M10/0525B81B7/04B81C1/00031Y02E60/10
Inventor 李英奇肖姗姗肖力光盖广清王立艳王敬维孙珂
Owner JILIN JIANZHU UNIVERSITY
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