CN101783421A - Additive of lithium ion battery liquid electrolyte and obtained electrolyte - Google Patents
Additive of lithium ion battery liquid electrolyte and obtained electrolyte Download PDFInfo
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- CN101783421A CN101783421A CN200910036874A CN200910036874A CN101783421A CN 101783421 A CN101783421 A CN 101783421A CN 200910036874 A CN200910036874 A CN 200910036874A CN 200910036874 A CN200910036874 A CN 200910036874A CN 101783421 A CN101783421 A CN 101783421A
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Abstract
The invention relates to an additive of lithium ion battery liquid electrolyte. The additive is nano-scale inorganic oxide powder. The additive is added into the lithium ion battery liquid electrolyte. The amount of the additive is 1%-20% of the weight of the used electrolyte. As the additive is the nano-scale inorganic oxide powder, the additive absorbs the liquid electrolyte and acts as a flame retardant, thus increasing the safety performance and cycle performance of the battery.
Description
Technical field
The present invention relates to a kind of additive of lithium ion battery liquid electrolyte and the electrolyte of gained.
Background technology
At present, lithium rechargeable battery adopts liquid electrolyte mostly, under adverse circumstances, as high temperature, overcharge and the situation of internal short-circuit under, big calorimetric is volatilized, decomposes, produced to liquid electrolyte easily, thereby might cause internal temperature of battery too high and entire cell was lost efficacy.In addition, in cylindrical battery, over-charge protective mechanism is that inside battery air pressure makes burst disk upset and makes current blocking device CID and burst disk breaks away from, and makes entire cell open circuit and plays the effect that the protection lithium ion battery overcharges; But lithium ion battery design at present often can not effectively be controlled interior pressure, thereby cylindrical battery is lost the effect phenomenon often when overcharging, be easy to generate potential safety hazard.Aspect electrical property, along with the increase of cycle-index, electrolyte constantly is consumed, the diving that tends to circulate of whole electric core because of insufficient electrolyte, thus cause entire cell to lose efficacy.
Summary of the invention
The technical problem that the present invention need solve provides a kind of electrolysis additive that improves lithium ion battery security energy and electrical property.
The technical problem to be solved in the present invention is achieved through the following technical solutions: a kind of additive of lithium ion battery liquid electrolyte, described additive are nano level powder shape inorganic oxides.
Further: in above-mentioned additive, described inorganic oxide is one or more in aluminium oxide, silica, magnesium oxide, the zinc oxide, preferably aluminium oxide or silica.Described inorganic oxide raw meal particle size is below 10 μ m.
In addition, the present invention also provides the lithium ion battery liquid electrolyte that contains above-mentioned additive, and the percentage by weight that the amount of described additive accounts for used electrolyte is 1%～20%.
Because this additive is nano level powder inorganic oxide, it absorbs liquid electrolyte, serves as fire retardant, improves the security performance and the cycle performance of battery.In liquid electrolyte, the nano grade inorganic oxide addition has superconductivity effects in addition, can improve the ionic conductivity of electrolyte, thereby improves the heavy-current discharge performance of battery, resistance to low temperature; This additive can also absorb liquid electrolyte, and liquid electrolyte is present in the nano particle with stable state, can keep the stability of battery in cyclic process, thereby increases the cycle charging number of times, improves the cycle performance of battery; This additive can also be filled the vacant part of inside battery, can increase inner pressure of battery and make battery by overcharging when overcharging, and improves the security performance of battery.
Embodiment
Purport of the present invention is at the additive of selecting suitable inorganic oxide as lithium ion battery liquid electrolyte, and this additive absorbs liquid electrolyte, serves as fire retardant, improves the security performance and the battery cycle charging performance of battery.In liquid electrolyte, nanometer additive has superconductivity effects in addition, can improve the ionic conductivity of electrolyte, thereby improves the heavy-current discharge performance of battery, resistance to low temperature; This additive can also absorb liquid electrolyte, and liquid electrolyte is present in the nano particle with stable state, can keep the stability of battery in cyclic process, thereby increases the cycle charging number of times, improves the cycle charging performance of battery; This additive can also be filled the vacant part of inside battery, can increase inner pressure of battery and make battery by overcharging when overcharging, and improves the security performance of battery.
Below in conjunction with embodiment content of the present invention is described in further detail, mentioned content is not a limitation of the invention in the execution mode, and the selection of parameter can be suited measures to local conditions and the result be there is no substantial effect among the preparation method.
At first, the basic scheme of summary material prescription of the present invention: a kind of additive of lithium ion battery liquid electrolyte, described additive are nano level powder inorganic oxides.The percentage by weight that the described lithium ion battery liquid electrolyte that contains this additive, the amount of additive account for used electrolyte is 1%～20%.
Embodiment 1
A kind of additive of lithium ion battery liquid electrolyte, described additive are nano level powder aluminium oxide, and aluminum oxide grain size is below 10 μ m.This additive is joined in the electrolyte, and the percentage by weight that the amount of additive accounts for used electrolyte is 5%.Improve the performance such as the heavy-current discharge of battery, low temperature resistant, the cycle charging number of times increases greatly, and security performance improves.Behind this additive of adding 5%, heavy-current discharge performance has promoted 5 percentage points at least, sees heavy-current discharge performance comparison diagram shown in Figure 1 in electrolyte; The low temperature discharge capacity promotes 5 percentage points at least, sees shown in Figure 2 at-20 ℃ of discharge performance comparison diagrams; Cycle-index has been increased to 700 times by 500 times at least, see cycle performance comparison diagram shown in Figure 3: security performance such as acupuncture make moderate progress, and under the situation, the battery that contains additive is when acupuncture on year-on-year basis, temperature rise is seen acupuncture temperature rise comparison diagram shown in Figure 4 than low of the battery that does not contain additive more:
Embodiment 2
A kind of additive of lithium ion battery liquid electrolyte, described additive are nano level powder aluminium oxide, and aluminum oxide grain size is below 10 μ m.This additive is joined in the electrolyte, and the percentage by weight that the amount of additive accounts for used electrolyte is 10%.Improve the security performance performance such as the over-charging of column lithium ion battery.
The mode that the column lithium ion battery protection overcharges is that the air pressure inside increase makes the burst disk upset; and the current blocking device is come off; thereby reach the purpose that entire cell is opened circuit, if the untimely security incidents such as entire cell is out of control, on fire, blast that will make of burst disk action may take place at any time.So burst disk is moved in advance, can improve the fail safe of column lithium ion battery when overcharging or abuse.After in electrolyte, adding this additive, can make burst disk operate time in advance, improve the security performance of battery, see the curve comparison diagram that overcharges shown in Figure 5:
Embodiment 3
A kind of additive of lithium ion battery liquid electrolyte, described additive are nano level powder silica.The granularity of silica is below 10 μ m.This additive is joined in the electrolyte, and the percentage by weight that the amount of additive accounts for used electrolyte is 12%.Thereby the performance of raising battery such as low temperature resistant, the cycle charging number of times increases.Add this additive in electrolyte after, low temperature performance promotes to some extent, sees shown in Figure 6 at-20 ℃ of discharge performance comparison diagrams; Cycle performance makes moderate progress, and sees circulation comparison diagram shown in Figure 7.
Description of drawings
Fig. 1 is battery and the conventional batteries heavy-current discharge performance comparison diagram that contains the present invention 5% additive;
Fig. 2 contains the present invention 5% the battery of additive and conventional batteries at-20 ℃ of discharge performance comparison diagrams;
Fig. 3 is battery and the conventional batteries cycle performance comparison diagram that contains the present invention 5% additive;
Fig. 4 is battery and the conventional batteries acupuncture temperature rise comparison diagram that contains the present invention 5% additive;
Fig. 5 is that the battery and the conventional batteries that contain the present invention 10% additive overcharge the curve comparison diagram;
Fig. 6 is battery and the conventional batteries-20 ℃ discharge performance comparison diagram that contains the present invention 12% additive;
Fig. 7 is battery and the conventional batteries circulation comparison diagram that contains the present invention 12% additive.
Claims (5)
1. the additive of a lithium ion battery liquid electrolyte, it is characterized in that: described additive is nano level powder shape inorganic oxide.
2. the additive of lithium ion battery liquid electrolyte according to claim 1, it is characterized in that: described inorganic oxide is one or more in aluminium oxide, silica, magnesium oxide, the zinc oxide.
3. the additive of lithium ion battery liquid electrolyte according to claim 2, it is characterized in that: described inorganic oxide is aluminium oxide or silica.
4. the additive of lithium ion battery liquid electrolyte according to claim 3, it is characterized in that: described inorganic oxide granularity is below 10 μ m.
5. one kind contains the lithium ion battery liquid electrolyte that right requires each described additive among the 1-4, and it is characterized in that: the percentage by weight that the amount of described additive accounts for used electrolyte is 1%～20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910036874A CN101783421A (en) | 2009-01-15 | 2009-01-15 | Additive of lithium ion battery liquid electrolyte and obtained electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910036874A CN101783421A (en) | 2009-01-15 | 2009-01-15 | Additive of lithium ion battery liquid electrolyte and obtained electrolyte |
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| CN101783421A true CN101783421A (en) | 2010-07-21 |
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| CN200910036874A Pending CN101783421A (en) | 2009-01-15 | 2009-01-15 | Additive of lithium ion battery liquid electrolyte and obtained electrolyte |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016110126A1 (en) * | 2015-01-06 | 2016-07-14 | 宁波南车新能源科技有限公司 | Super capacitor organic electrolyte containing inorganic nanoparticle |
| CN108039512A (en) * | 2017-11-27 | 2018-05-15 | 中南大学 | A kind of lithium, sodium-ion battery fire retardant and its methods for making and using same |
| CN109950624A (en) * | 2019-04-18 | 2019-06-28 | 中国科学院过程工程研究所 | A kind of preparation of modified Nano aluminium oxide additive and its low-temperature electrolyte |
| CN110265719A (en) * | 2019-06-04 | 2019-09-20 | 江西力能新能源科技有限公司 | A kind of electrolyte and its preparation process of lithium battery |
| CN110289449A (en) * | 2019-06-04 | 2019-09-27 | 江西力能新能源科技有限公司 | A kind of electrolyte and its application on low temperature lithium battery |
| CN110504490A (en) * | 2019-08-23 | 2019-11-26 | 北京理工大学 | A kind of high-voltage electrolyte and preparation method thereof of siliceous based additive |
-
2009
- 2009-01-15 CN CN200910036874A patent/CN101783421A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016110126A1 (en) * | 2015-01-06 | 2016-07-14 | 宁波南车新能源科技有限公司 | Super capacitor organic electrolyte containing inorganic nanoparticle |
| CN108039512A (en) * | 2017-11-27 | 2018-05-15 | 中南大学 | A kind of lithium, sodium-ion battery fire retardant and its methods for making and using same |
| CN109950624A (en) * | 2019-04-18 | 2019-06-28 | 中国科学院过程工程研究所 | A kind of preparation of modified Nano aluminium oxide additive and its low-temperature electrolyte |
| CN110265719A (en) * | 2019-06-04 | 2019-09-20 | 江西力能新能源科技有限公司 | A kind of electrolyte and its preparation process of lithium battery |
| CN110289449A (en) * | 2019-06-04 | 2019-09-27 | 江西力能新能源科技有限公司 | A kind of electrolyte and its application on low temperature lithium battery |
| CN110504490A (en) * | 2019-08-23 | 2019-11-26 | 北京理工大学 | A kind of high-voltage electrolyte and preparation method thereof of siliceous based additive |
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Application publication date: 20100721 |