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Preparation method of CuO micro-/nano-array electrode for lithium ion battery

A lithium-ion battery and array electrode technology, which is applied in the nanomaterial preparation technology and energy fields, can solve the problems of poor cycle performance and rate performance of CuO, achieve good electrochemical performance, simple preparation procedures, and relieve volume change and stress. Effect

Inactive Publication Date: 2012-07-25
HARBIN INST OF TECH
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Problems solved by technology

[0003] The invention solves the technical problem of poor cycle performance and rate performance of the existing lithium-ion battery negative electrode material CuO, and provides a method for preparing a lithium-ion battery micro / nano CuO array electrode

Method used

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  • Preparation method of CuO micro-/nano-array electrode for lithium ion battery
  • Preparation method of CuO micro-/nano-array electrode for lithium ion battery
  • Preparation method of CuO micro-/nano-array electrode for lithium ion battery

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specific Embodiment approach 1

[0027] Specific implementation mode 1: The preparation method of the lithium-ion battery micro / nano CuO array electrode in this embodiment is as follows:

[0028] 1. Cover the copper foil 1cm~3cm above the ammonia solution, and then grow it at 5℃~40℃ for 2h~12h to obtain Cu(OH) 2 micro / nano gear arrays;

[0029] Second, the Cu(OH)2 The micro / nano gear array is placed in an inert atmosphere, raised to 120°C at a rate of 2°C / min to 5°C / min, kept at 120°C for 2 hours, and then raised at a rate of 2°C / min to 5°C / min to 180°C, and kept at 180°C for 2 hours, and then naturally cooled to room temperature to obtain a CuO micro / nano gear array electrode; the ammonia solution described in step 1 is composed of concentrated ammonia water and water in a volume ratio of 1:1-6 .

[0030] The copper foil used in this embodiment is produced by Kingboard Copper Foil Group Co., Ltd.

specific Embodiment approach 2

[0031] Embodiment 2: This embodiment differs from Embodiment 1 in that the mass concentration of the concentrated ammonia water is 25%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0032] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the inert atmosphere described in step two is N 2 Atmosphere or Ar 2 atmosphere. Others are the same as in the first or second embodiment.

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Abstract

A preparation method of a CuO micro- / nano-array electrode for a lithium ion battery relates to a preparation method of an anode material for the lithium ion battery. According to the preparation method, the technical problem that cycle performance and rate capability of the cathode material CuO for the lithium ion battery are poor in the prior art is solved. The preparation method comprises the following steps: 1. preparing Cu(OH)2 arrays; 2. placing the Cu(OH)2 arrays in an inert atmosphere, preserving heat, then naturally cooling the arrays to the room temperature to obtain the product. According to the prepared CuO micro- / nano-array electrode, each CuO nano-array is connected with a current collector substrate, so that the array electrode has good electrical conductivity and charge transfer performance. The method is beneficial for enlarging contact area between electrode and electrolyte, shortening diffusion path of lithium ions, slowing down volume change and stress action of electrode materials during charging or discharging, and representing excellent electrochemical performance, thereby improving the cycle performance and rate capability.

Description

technical field [0001] The invention belongs to the field of nanometer material preparation technology and energy, and in particular relates to a preparation method of an anode material of a lithium ion battery. Background technique [0002] Lithium-ion batteries have been gradually applied in mobile electronic devices, electric vehicles, backup energy storage, smart grid and other fields, however, it is still difficult to meet the power density and energy requirements of electric tools, electric vehicles (EVs), hybrid electric vehicles (PHEVs) Density requirements. In recent years, 3d transition metal oxides (CoO, CuO, NiO, etc.) that realize lithium intercalation and deintercalation through redox reaction mechanism have shown high charge and discharge capacity in lithium ion battery anode materials, among which the theoretical discharge capacity of CuO is 674mAh / g, has a good application prospect. However, the conductivity of this transition metal oxide is poor, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02H01M4/485B82Y30/00B82Y40/00
CPCY02E60/122Y02E60/10
Inventor 孙克宁陈欣张乃庆
Owner HARBIN INST OF TECH
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