CN207320233U - A kind of high-capacity lithium ion cell - Google Patents
A kind of high-capacity lithium ion cell Download PDFInfo
- Publication number
- CN207320233U CN207320233U CN201720831833.1U CN201720831833U CN207320233U CN 207320233 U CN207320233 U CN 207320233U CN 201720831833 U CN201720831833 U CN 201720831833U CN 207320233 U CN207320233 U CN 207320233U
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- CN
- China
- Prior art keywords
- lithium ion
- current collector
- copper foil
- electrode
- foil current
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Cell Electrode Carriers And Collectors (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model discloses a kind of high-capacity lithium ion cell, including anode cover, silicon electrode, membrane, lithium piece and negative electrode casing, gasket and shrapnel are additionally provided between the lithium piece and negative electrode casing, the silicon electrode is electrode material coated in being formed in copper foil current collector, is arranged to micro-sphere structure in the copper foil current collector；The lithium ion battery of the utility model, by the way that the body structure surface of copper foil current collector is arranged to micro-sphere structure, can effectively limiting lithium ion is embedded and abjection electrode material caused by electrode volume change, the integrality of holding electrode structure；Microballoon is embedded in electrode material, electrode material is connected with copper foil current collector as conducting wire, when electrode material is cracked due to the change of stress, micro-sphere structure still can be by electron transport to copper foil current collector, greatly improve conductive environment, reduce the internal resistance of lithium ion battery, so that high power capacity silicon cathode lithium ion battery shows more preferable chemical property.
Description
Technical field
Technical field of lithium batteries is the utility model is related to, more particularly to a kind of high-capacity lithium ion cell.
Background technology
With the development of world economy, the improvement of people's living standards, the contradiction day between energy resource supply and energy demand
It is beneficial sharp.Continuous with development potentiality of the lithium ion battery in terms of energy and energy storage excavates, and lithium ion battery progresses into
The sight of the public.At present in terms of lithium ion battery, positive and negative pole material, electrolyte and membrane of the people to lithium ion battery
The research of material it is more, it is and less to research in terms of collector.
Utility model content
The purpose of the utility model is to overcome the defects of the prior art, there is provided a kind of high-capacity lithium ion cell, it is described
What the technical solution of high-capacity lithium ion cell was realized in：
A kind of high-capacity lithium ion cell, it is characterised in that：The lithium ion battery is fastening lithium ionic cell, including just
Pole shell, silicon electrode, membrane, lithium piece and negative electrode casing, are additionally provided with gasket and shrapnel, the cathode between the lithium piece and negative electrode casing
Shell, silicon electrode, membrane, lithium piece, gasket and shrapnel, the negative electrode casing sequentially coaxially heart are set, and the silicon electrode is electrode material coating
Formed in copper foil current collector, be arranged to micro-sphere structure in the copper foil current collector.
Further, the electrode material includes nano-silicon, acetylene black and binding agent PVDF.
Preferably, the thickness of the copper foil current collector is 20~40 μm.
Preferably, the particle diameter of the microsphere particle is 75~100 μm.
The lithium ion battery of the utility model, can by the way that the body structure surface of copper foil current collector is arranged to micro-sphere structure
The change of electrode volume, the integrality of holding electrode structure caused by effective limiting lithium ion insertion and abjection electrode material.
Microballoon is embedded in electrode material, electrode material is connected with copper foil current collector as conducting wire, when electrode material is due to stress
When changing and cracking, micro-sphere structure still can by electron transport to copper foil current collector, greatly improve conductive environment,
The internal resistance of lithium ion battery is reduced, so that high power capacity silicon cathode lithium ion battery shows more preferable chemical property.
Brief description of the drawings
Fig. 1 is the structural blast schematic diagram of the utility model lithium ion battery；
Fig. 2 is the copper foil current collector overall schematic of the utility model lithium ion battery；
Fig. 3 is the copper foil current collector sectional schematic diagram of the utility model lithium ion battery；
Fig. 4 is the cycle performance and coulombic efficiency curve synoptic diagram of the utility model lithium ion battery；
Fig. 5 is cycle performance and the signal of coulombic efficiency curve of contrast lithium ion battery when copper foil current collector is smooth
Figure.
Reference numeral：1- anode covers, 2 silicon electrodes, 3- membranes, 4- lithium pieces, 5- gaskets, 6- shrapnels, 7- negative electrode casings, 8- copper foils
Collector, 9- microballoons, 10- electrolyte.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in FIG. 1 to 3, a kind of high-capacity lithium ion cell, the lithium ion battery are fastening lithium ionic cell, bag
Anode cover 1, silicon electrode 2, membrane 3, lithium piece 4 and negative electrode casing 7 are included, 6 He of gasket is additionally provided between the lithium piece 4 and negative electrode casing 7
Shrapnel 7, the anode cover 1, silicon electrode 2, membrane 3, lithium piece 4, gasket 5 and shrapnel 6, the negative electrode casing 7 sequentially coaxially heart are set, described
Silicon electrode 2 is electrode material coated in being formed in copper foil current collector 8, is arranged to micro-sphere structure in the copper foil current collector 8, its
It is arranged to numerous microballoon 9 on surface.
When it is implemented, the electrode material includes nano-silicon, acetylene black and binding agent PVDF.
When it is implemented, the thickness of the copper foil current collector 4 is 20~40 μm.
When it is implemented, the particle diameter of 10 particle of microballoon is 75~100 μm.
When it is implemented, between the anode cover 1 and silicon electrode 2, between silicon electrode 2 and membrane 3, membrane 3 and lithium piece 4 it
Between be both provided with electrolyte 10.
As shown in Fig. 4~Fig. 5, Fig. 4 is following for the lithium ion battery when microspherulite diameter of copper foil current collector is 75-100 μm
Ring performance and coulombic efficiency schematic diagram, although capacity attenuation reaches 46% first, capacity is maintained at 5% in follow-up circulation
Within, the capacity when circulating for the 40th time reaches 780mAh/g, and coulombic efficiency reaches 95.89%, this explanation copper foil current collector table
The microballoon in face plays positive effect, and micro-sphere structure can electrode volume change embedded with limiting lithium ion and abjection electrode material
To change, the completion of holding structure, microballoon is embedded in electrode material, and electrode material is connected with copper foil current collector as conducting wire,
When electrode material is cracked due to the change of stress, micro-sphere structure still can by electron transport to copper foil current collector,
Greatly improve conductive environment, reduce the internal resistance of lithium ion battery, so that lithium ion battery shows more preferable electrification
Learn performance.
The technology contents and technical characteristic of the utility model have revealed that as above those skilled in the art still may base
The replacement and modification without departing substantially from the utility model in essence are made in the teaching of the utility model, therefore, the utility model protection
Scope is not limited to the revealed content of embodiment, also including various replacements and modification without departing substantially from the utility model in essence.
Claims (3)
- A kind of 1. high-capacity lithium ion cell, it is characterised in that：The lithium ion battery is fastening lithium ionic cell, including cathode Shell, silicon electrode, membrane, lithium piece and negative electrode casing, are additionally provided with gasket and shrapnel, the cathode between the lithium piece and negative electrode casing Shell, silicon electrode, membrane, lithium piece, gasket and shrapnel, the negative electrode casing sequentially coaxially heart are set, and the silicon electrode is electrode material coating Formed in copper foil current collector, be arranged to micro-sphere structure in the copper foil current collector.
- 2. high-capacity lithium ion cell according to claim 1, it is characterised in that：The thickness of the copper foil current collector is 20 ~40 μm.
- 3. high-capacity lithium ion cell according to claim 1, it is characterised in that：The particle diameter of the microsphere particle for 75~ 100μm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720831833.1U CN207320233U (en) | 2017-07-11 | 2017-07-11 | A kind of high-capacity lithium ion cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720831833.1U CN207320233U (en) | 2017-07-11 | 2017-07-11 | A kind of high-capacity lithium ion cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207320233U true CN207320233U (en) | 2018-05-04 |
Family
ID=62434560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720831833.1U Expired - Fee Related CN207320233U (en) | 2017-07-11 | 2017-07-11 | A kind of high-capacity lithium ion cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207320233U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808101A (en) * | 2018-06-13 | 2018-11-13 | 中国科学院宁波材料技术与工程研究所 | A kind of lithium ion battery and preparation method thereof |
-
2017
- 2017-07-11 CN CN201720831833.1U patent/CN207320233U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808101A (en) * | 2018-06-13 | 2018-11-13 | 中国科学院宁波材料技术与工程研究所 | A kind of lithium ion battery and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180504 |