CN104616912B - Electrolyte and its ultracapacitor - Google Patents
Electrolyte and its ultracapacitor Download PDFInfo
- Publication number
- CN104616912B CN104616912B CN201510037842.9A CN201510037842A CN104616912B CN 104616912 B CN104616912 B CN 104616912B CN 201510037842 A CN201510037842 A CN 201510037842A CN 104616912 B CN104616912 B CN 104616912B
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- China
- Prior art keywords
- electrolyte
- ultracapacitor
- inorganic salts
- hydrazine hydrate
- water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Abstract
One aspect of the present invention provides a kind of electrolyte, and its component includes：Hydrazine hydrate, water and inorganic salts.Second aspect of the present invention provides a kind of ultracapacitor, and it includes：Positive pole, negative pole, barrier film and electrolyte between both positive and negative polarity；The electrolyte component includes hydrazine hydrate, water and inorganic salts.By adding subzero hydrazine hydrate and inorganic salts, it can effectively prevent electrolyte low temperature from solidifying, it can widen the operating temperature range of ultracapacitor as electrolyte applied to ultracapacitor, and particularly low-temperature space is effectively increased.
Description
Technical field
The present invention relates to electrochemical energy storage, more particularly to a kind of electrolyte and its ultracapacitor.
Background technology
Ultracapacitor is a kind of novel energy storage apparatus, and between ordinary capacitor and chemical cell, it has performance
The advantages that energy density is of a relatively high, and moment charge-discharge electric power is big, service life is long, be widely used in hybrid vehicle,
Electric automobile, track traffic, solar energy and wind-power electricity generation and other need energy abrupt release, storage or recycling field.
The electrolyte of ultracapacitor is generally divided into two major classes：Organic system and water system, it is main both at home and abroad to concentrate research to have
Machine system super capacitor, it is prepared, and complicated, cost is high.And aqueous super capacitor prepares that simple, cost is low, but large-scale promotion by
Its low-temperature characteristics is formed on, electrolyte easily solidifies below freezing, ultracapacitor is lost function.
The content of the invention
In view of this, it is an object of the invention to provide a kind of water system but the good electrolyte of cryogenic property and its super
Capacitor.
One aspect of the present invention provides a kind of electrolyte, and its component includes：Hydrazine hydrate, water and inorganic salts.
Second aspect of the present invention provides a kind of ultracapacitor, and it includes：Positive pole, negative pole, between both positive and negative polarity
Barrier film and electrolyte；It is characterized in that：The electrolyte component includes hydrazine hydrate, water and inorganic salts.
The beneficial effects of the invention are as follows：By adding subzero hydrazine hydrate, inorganic salts as conductive ion and impurity,
It can effectively prevent electrolyte low temperature from solidifying, it can widen the work temperature of ultracapacitor as electrolyte applied to ultracapacitor
Scope is spent, is particularly effectively increased low-temperature working area.
Brief description of the drawings
Fig. 1 varies with temperature curve map for the ultracapacitor electric capacity of embodiment one and embodiment two；
Fig. 2 is the curve map of cyclic voltammetry of the ultracapacitor of embodiment two at 0 DEG C；
Fig. 3 is the curve map of condition of constant Current step of the ultracapacitor of embodiment two at -30 DEG C.
Embodiment
One aspect of the present invention provides a kind of electrolyte, and its component includes：Hydrazine hydrate, water and inorganic salts.
Preferably, the hydrazine hydrate accounts for 5wt%~35wt% of the electrolyte.It is further preferred that the hydrazine hydrate accounts for
10wt%~20wt% of the electrolyte.
Preferably, the inorganic salts are sodium chloride.Still more preferably, the concentration of the sodium chloride be 0.5M~
1.0M。
Preferably, the inorganic salts are the mixture of sodium chloride and ammonium chloride.Still more preferably, the ammonium chloride and
The concentration of sodium chloride is respectively 0.5 M~1.0M.
Another aspect of the present invention provides a kind of ultracapacitor, and it includes：Positive pole, negative pole, between both positive and negative polarity
Barrier film and electrolyte；It is characterized in that：The electrolyte component includes hydrazine hydrate, water and inorganic salts.
The electrolyte and its ultracapacitor of the present invention are discussed in detail below in conjunction with specific embodiment.
Embodiment one
Prepare electrolyte：5.85g sodium chloride is dissolved in 90ml water, then after adding 15ml hydrazine hydrates, it is molten to be sufficiently stirred this
Liquid, electrolyte is prepared.
The preparation of ultracapacitor：The Kynoar that mass percent is 7 % is first dissolved in N-2 methyl pyrrolidones
In, stir to Kynoar and be completely dissolved, be then 4% by activated carbon that mass percent is 85%, mass percent
KS-6 conductions powdered carbon and black pour into slurry of conductive acetylene that mass percent is 4% are stirred, after high-speed stirred 12h, powdered carbon
It is completely dissolved and slurry darkly color colloidal, slurry is coated uniformly in aluminum foil current collector with rubbing method, coating thickness control
At 200 μm, it is placed on coated aluminium foil is smooth afterwards in drying box, 5min is toasted at 80 DEG C so that N-2 methylpyrroles
Alkanone is all volatilized, and obtains pole plate, the pole plate after drying is finally cut into 2cm × 2cm square pole plate, and in aluminum foil current collector
On leave welding aluminium pole ears, barrier film is placed between two square pole plates and stacks neat, square pole plate scribbles active material
One side be in contact with barrier film, the barrier film, square pole plate are sealed using packaging shell and irrigate the electrolysis prepared
Liquid, obtain carbon electrode ultracapacitor.
Electric performance test：Manufactured carbon electrode ultracapacitor is made on Shanghai Chen Hua CHI660D electrochemical workstations
With cyclic voltammetry and condition of constant Current step method measurement capacitance, specific capacitance, energy density and power density.Cyclic voltammetry is swept
It is 0.05V/s to retouch speed, and voltage bit wide is ± 1.0V, and the electric current of condition of constant Current step method is 1mA.
Test result is as follows：
| Temperature（℃） | Capacitance（F） | Specific capacitance（F/g） | Energy density (Wh/kg) | Power density (W/kg) |
| 20 | 0.3 | 25.31 | 3.52 | 4.82×103 |
| 10 | 0.295 | 24.89 | 3.45 | 4.74×103 |
| 0 | 0.289 | 24.388 | 3.39 | 4.64×103 |
| -10 | 0.282 | 23.80 | 3.30 | 4.53×103 |
| -20 | 0.218 | 18.40 | 2.56 | 2.65×103 |
| -30 | 0.06 | 5.06 | 0.7 | 7.62×101 |
Embodiment two
Prepare electrolyte：4 g sodium chloride and 5.45 g ammonium chlorides are dissolved in 95 ml water, then add 15 ml hydrazine hydrates
Afterwards, this solution is sufficiently stirred, electrolyte is prepared.
The preparation of the ultracapacitor of the present embodiment and electric performance test process are identical with embodiment one, and test result is such as
Under：
| Temperature（℃） | Capacitance（F） | Specific capacitance（F/g） | Energy density (Wh/kg) | Power density (W/kg) |
| 20 | 0.285 | 24.05 | 3.34 | 4.58×103 |
| 10 | 0.28 | 23.63 | 3.28 | 4.5×103 |
| 0 | 0.276 | 23.25 | 3.23 | 4.43×103 |
| -10 | 0.273 | 23.04 | 3.20 | 4.39×103 |
| -20 | 0.179 | 15.06 | 2.09 | 2.15×103 |
| -30 | 0.02 | 1.68 | 0.24 | 1.99×102 |
Embodiment three
Prepare electrolyte：4 g sodium chloride and 5.45 g ammonium chlorides are dissolved in 95 ml water, then add 5.0 ml hydrazine hydrates
Afterwards, this solution is sufficiently stirred, electrolyte is prepared.
The preparation of the ultracapacitor of the present embodiment and electric performance test process are identical with embodiment one, and test result is such as
Under：
| Temperature（℃） | Capacitance（F） | Specific capacitance（F/g） | Energy density (Wh/kg) | Power density (W/kg) |
| 20 | 0.274 | 23.01 | 3.12 | 4.28×103 |
| 10 | 0.270 | 22.70 | 3.07 | 4.18×103 |
| 0 | 0.250 | 21.02 | 2.85 | 3.83×103 |
| -10 | 0.166 | 14.01 | 1.89 | 2.29×103 |
| -20 | 0.108 | 9.11 | 1.23 | 1.07×103 |
| -30 | 0.036 | 3.04 | 0.41 | 3.64×101 |
Example IV
Prepare electrolyte：4 g sodium chloride and 5.45 g ammonium chlorides are dissolved in 95 ml water, then add 45 ml hydrazine hydrates
Afterwards, this solution is sufficiently stirred, electrolyte is prepared.
The preparation of the ultracapacitor of the present embodiment and electric performance test process are identical with embodiment one, and test result is such as
Under：
| Temperature（℃） | Capacitance（F） | Specific capacitance（F/g） | Energy density (Wh/kg) | Power density (W/kg) |
| 20 | 0.29 | 24.05 | 3.41 | 4.48×103 |
| 10 | 0.287 | 23.8 | 3.37 | 4.41×103 |
| 0 | 0.254 | 21.06 | 2.98 | 3.90×103 |
| -10 | 0.194 | 16.02 | 2.28 | 2.79×103 |
| -20 | 0.108 | 8.94 | 1.27 | 1.27×103 |
| -30 | 0.049 | 7.76 | 0.58 | 6.21×101 |
Fig. 1 varies with temperature curve map for the ultracapacitor electric capacity of embodiment one and embodiment two；
Fig. 2 is the curve map of cyclic voltammetry of the ultracapacitor of embodiment two at 0 DEG C；
Fig. 3 is the curve map of condition of constant Current step of the ultracapacitor of embodiment two at -30 DEG C.
The explanation of above example is only intended to help the method and its core concept for understanding the present invention.It should be pointed out that pair
For those skilled in the art, under the premise without departing from the principles of the invention, the present invention can also be carried out
Some improvement and modification, these are improved and modification is also fallen into my protection domain of the claims in the present invention.
Claims (1)
1. a kind of ultracapacitor, it includes：Positive pole, negative pole, barrier film and electrolyte between both positive and negative polarity；The electrolyte
Component include：Hydrazine hydrate, water and inorganic salts,
The hydrazine hydrate accounts for 10wt%~20wt% of the electrolyte,
The inorganic salts are sodium chloride or the mixture of sodium chloride and ammonium chloride,
The concentration of the inorganic salts is 0.5M~1.0M.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510037842.9A CN104616912B (en) | 2015-01-26 | 2015-01-26 | Electrolyte and its ultracapacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510037842.9A CN104616912B (en) | 2015-01-26 | 2015-01-26 | Electrolyte and its ultracapacitor |
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| CN104616912A CN104616912A (en) | 2015-05-13 |
| CN104616912B true CN104616912B (en) | 2017-12-22 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103140973A (en) * | 2010-10-27 | 2013-06-05 | 大发工业株式会社 | Fuel cell |
| CN103508442A (en) * | 2012-06-19 | 2014-01-15 | 海洋王照明科技股份有限公司 | Preparation method of graphene |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100314831B1 (en) * | 1994-10-31 | 2002-08-21 | 삼성전자 주식회사 | Open alkali zinc secondary battery |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103140973A (en) * | 2010-10-27 | 2013-06-05 | 大发工业株式会社 | Fuel cell |
| CN103508442A (en) * | 2012-06-19 | 2014-01-15 | 海洋王照明科技股份有限公司 | Preparation method of graphene |
Non-Patent Citations (1)
| Title |
|---|
| "水溶液Zn-H2O2等电池探索";蒋建红;《中国优秀硕士学位论文全文数据库工程科技II辑》;20110630(第2012/01期);第13-17页 * |
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