CN108360022A - A kind of method that melten salt electriochemistry method recycles cobalt element in anode material of lithium battery - Google Patents
A kind of method that melten salt electriochemistry method recycles cobalt element in anode material of lithium battery Download PDFInfo
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- CN108360022A CN108360022A CN201810410276.5A CN201810410276A CN108360022A CN 108360022 A CN108360022 A CN 108360022A CN 201810410276 A CN201810410276 A CN 201810410276A CN 108360022 A CN108360022 A CN 108360022A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/34—Electrolytic production, recovery or refining of metals by electrolysis of melts of metals not provided for in groups C25C3/02 - C25C3/32
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
- C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
- C22B23/043—Sulfurated acids or salts thereof
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
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Abstract
A kind of method that melten salt electriochemistry method recycles cobalt element in anode material of lithium battery, belongs to transition metal element recycle and reuse technical field.This method is：1) lithium battery is subjected to electric discharge dismantling, positive electrode is crushed, leachate, 50~80 DEG C of 10~60min of stirring, filtering is added；2) NaOH aqueous solutions are added dropwise into filtrate, when pH is 4.7~8, filtering；NaOH aqueous solutions are added dropwise into first-time filtrate, when pH is 9.2~10.0, filters, is precipitated, dry, grinding, tabletting, calcination obtains electrode tabletting；3) it is connected as cathode with nickel foam package cobalt oxide electrode tabletting and molybdenum filament, graphite rod is connected as anode with stainless steel wire；4) fused salt raw material is heated to fusion temperature, cathode and anode are inserted into fused salt, apply voltage, and after electrolysis, cathode takes out, cooling, and cleaned by ultrasonic vibration obtains cobalt.Recycling the cobalt element in waste lithium cell positive electrode using this method has low cost, efficient, easy to operate advantage.
Description
Technical field
The present invention relates to transition metal element recycle and reuse technical fields in positive electrode in waste lithium cell, specifically
It is related to a kind of method that melten salt electriochemistry method recycles cobalt element in anode material of lithium battery.
Background technology
Compared with conventional batteries technology, lithium battery charges faster, and use is more longlasting, therefore, before the application of lithium ion battery
Scape is very wide.According to ASSOCIATE STATISTICS, lithium ion battery at least accounts for 70% or more in the battery that mobile phone uses, and 2015 complete
Ball mobile phone user alreadys exceed 5,200,000,000, and number of users from now on will also continue to expand, and as the high-tech such as tablet computer produce
The appearance of product and universal, the application of lithium ion battery is also by the potential market with bigger.In addition the ownership of electric vehicle is not
Disconnected to increase, the demand to lithium battery can also sustainable growth.With a large amount of uses of lithium battery, the recycling of battery is very urgent.Cobalt
It is the important rare element of one kind for constituting anode material of lithium battery, high efficiente callback utilization is carried out to it not only can be to avoid resource
Waste, while its pollution and harm to environment can be reduced, meet the requirement of sustainable development.The storage of combining global cobalt resource
Situation is deposited, it is the required of battery lasts development to make full use of cobalt resource.It is existing in the solution by electrolytic recovery battery just
The process of the metallic elements such as nickel, manganese, cobalt in the material of pole, will produce largely in practical operation containing heavy metal ion
Waste water pollutes the environment, and realizes electrolysis then to more environment-friendly in fused salt environment.
Invention content
The object of the present invention is to provide a kind of methods that melten salt electriochemistry method recycles cobalt element in anode material of lithium battery, will
The cobalt oxide produced by recycling battery connect with molybdenum filament with foamed nickel current collector package and cathode, graphite rod and stainless steel wire is made
Collector connection is made anode electrolysis and obtains metallic cobalt, and in chloride or carbonic acid fused salt, (actual temp is according to molten under high temperature
Depending on salt composition), apply potential electrolysis makes cobalt oxide be reduced to obtain metallic cobalt for a period of time, component lift-off fused salt is cooling,
Ultrasonic oscillation cleaning realizes electrolysis, Call Provision in fused salt environment except desalting, drying up in water.Method using the present invention is returned
Receiving the cobalt element in waste lithium cell positive electrode has low cost, efficient, easy to operate advantage.
The present invention a kind of melten salt electriochemistry method recycling anode material of lithium battery in cobalt element method, according to the following steps into
Row：
Step 1：The dissolving of anode material of lithium battery
(1) it after lithium battery being carried out discharge treatment, is disassembled, isolated anode material of lithium battery and negative material；
(2) after crushing anode material of lithium battery, leachate is added, in 50~80 DEG C of 10~60min of heated at constant temperature, simultaneously
With stirring, obtain leaching mixed liquor；
Wherein, by solid-to-liquid ratio, anode material of lithium battery：Leachate=(0.5~1) g:(5~20) mL；
Leachate is the H that molar concentration is 2~6mol/L2SO4The H for being 20~40% with percentage by volume2O2Mixing water
Solution, by volume, molar concentration are 2~6mol/L H2SO4：The H that percentage by volume is 20~40%2O2=(3~5):1；
(3) mixed liquor will be leached to be filtered, obtains filtrate；
Step 2：The preparation of cobalt oxide electrode tabletting
(1) into filtrate be added dropwise molar concentration be 1~3mol/L NaOH aqueous solutions, when pH value be 4.7~8 when, have Fe,
The Precipitation that Al is formed, filtering, the precipitation that removal Fe, Al are formed obtain first-time filtrate；
(2) continue into first-time filtrate be added dropwise molar concentration be 1~3mol/L NaOH aqueous solutions, when pH value be 9.2~
When 10.0, the Precipitation that Co is formed is filtered, obtains Co (OH)2Precipitation；
(3) by Co (OH)2Precipitation drying, grind into powder, tabletting, in air calcination obtain cobalt oxide electrode tabletting；
Step 3：Electrochemistry prepares
Wrap up cobalt oxide electrode tabletting with foamed nickel current collector, be then connected to cathode with molybdenum filament, graphite rod with it is stainless
Steel wire collector is connected to anode；
Fused salt raw material stoving is removed into moisture removal, is placed in crucible, then crucible is put into reactor, cathode and anode suspention
Above fused salt raw material, closed reactor is continually fed into argon gas into reactor, forms argon gas atmosphere；
Step 4：Electrolysis
(1) fused salt raw material is heated to fusion temperature and forms fused salt, cathode and anode are inserted into fused salt, constitute two electrode bodies
System, applies voltage in two electrodes, is electrolysed, and after the completion of electrolysis, the cathode after electrolysis is taken out, cooling, and is inserted into another
A cathode applies voltage and continues to be electrolysed；Wherein, the level interval of cathode and anode be 15 ± 5mm, apply voltage be 2.0~
2.1V, electrolysis time are 8~12h；
(2) by the cathode after cooling electrolysis, into the water, cleaned by ultrasonic vibration, the salt of removal cathode surface attachment,
Obtained cathode is cobalt.
In (1) of the step 1, the discharge treatment, specially：Discharge treatment is carried out using charge and discharge instrument, it is permanent
Banish electric 3A, discharge time >=30min.
In (2) of the step 1, the anode material of lithium battery crushes, after crushing, the grain of anode material of lithium battery
Degree is D97.
In (3) of the step 2, the drying is to dry 500~600min in air at 90~100 DEG C.
In (3) of the step 2, described is ground to, and obtains the Co (OH) that grain size is 0.10~0.20mm2Powder.
In (3) of the step 2, the tabletting is to weigh 2.0g Co (OH)2Powder is suppressed.
In (3) of the step 2, the calcination is the calcination 1~for 24 hours in air at 900~1000 DEG C.
In the step 3, the graphite rod can also be SnO2Ceramics or Ni based alloys.
In the step 3, the fused salt raw material is molten chloride raw material, carbonation fused salt raw material, hydroxide
One or more of fused salt raw material mixes；
When for molten chloride raw material, specially CaCl2, LiCl, NaCl, KCl, MgCl2, BaCl2In one kind or several
The fused salt mixt of kind；
When for carbonation fused salt raw material, specially Li2CO3, Na2CO3, K2CO3, CaCO3One or more of it is mixed
Close fused salt；
When for hydroxide fused salt raw material, specially LiOH, NaOH, the fused salt mixt of one or more of KOH.
In the step 3, the argon gas is passed through by reactor air inlet, is discharged by reactor gas outlet, when discharge,
The moisture that fused salt generates is taken away.
In the step 4, the cleaned by ultrasonic vibration, water for cleaning is the faintly acid clear water of 5≤pH≤7.
In the step 4, the cleaned by ultrasonic vibration, ultrasonic frequency is 0.5kHZ~100kHZ.
The method of cobalt element, advantage exist in a kind of melten salt electriochemistry method recycling anode material of lithium battery of the present invention
In：
1, the metallic elements such as nickel, manganese, cobalt in lithium battery recycling mainly recycling anode material of lithium battery.The present invention passes through
Using the cobalt element in electrochemical method recycling anode material of lithium battery in fused salt.First by the cobalt in cell positive material with
Form (the Co (OH) of hydroxide2) extract, then by Co (OH)2Calcination prepares cobalt oxide and carries out tabletting and and foam
Nickel set fluid connection is made cathode, graphite rod and the connection of stainless steel wire collector and anode is made is electrolysed in fused salt and obtain metal
Cobalt.
2, the present invention will recycle the cobalt oxide produced and nickel foam, molybdenum filament as cathode, graphite rod and stainless steel wire afflux
Anode is made in body connection, is electrolysed in fused salt environment, and in electrolysis, cathode generates metallic cobalt, and oxygen or titanium dioxide is made in anode
Carbon will not will provide power-assisted to environmental danger for the recycling of the lithium battery in China.
3, this technology invention has low cost, easy to operate, environmentally friendly, cobalt member that can be in high efficiente callback cellular li-ion battery
Element.
Description of the drawings
Fig. 1 is electrolysis unit schematic diagram of the present invention.
Specific implementation mode
With reference to embodiment, the present invention is described in further detail.
In following embodiment, unless specifically indicated, the equipment and raw material of use be it is purchased in market, purity be analyze it is pure and with
On.
Embodiment 1
A kind of method that melten salt electriochemistry method recycles cobalt element in anode material of lithium battery, carries out according to the following steps：
Step 1：The dissolving of anode material of lithium battery
(1) the obtained lithium battery of recycling is subjected to discharge treatment, constant-current discharge 3A using charge and discharge instrument, discharge time is
30min then carries out artificial dismantling battery, isolated anode material of lithium battery and negative material；
(2) after crushing anode material of lithium battery, leachate is added, in 70 DEG C of heated at constant temperature 30min, while with stirring
It mixes, obtains leaching mixed liquor；Wherein, by solid-to-liquid ratio, anode material of lithium battery：Leachate=1g:10mL；Leachate is mole dense
Degree is 4mol/L, H2SO4The H for being 30% with percentage by volume2O2Mixed liquor, by volume, molar concentration 4mol/L
H2SO4：The H that percentage by volume is 30%2O2=5:1；
(3) mixed liquor will be leached to be filtered, obtains filtrate；
Step 2：The preparation of cobalt oxide electrode tabletting
(1) the NaOH aqueous solutions that molar concentration is 2mol/L are added dropwise into filtrate, when pH value is 6.47, there is Fe, Al shape
At Precipitation, filtering, removal Fe, Al formed precipitation, obtain first-time filtrate；
(2) continue that the NaOH aqueous solutions that molar concentration is 2mol/L are added dropwise into first-time filtrate, when pH value is 10, Co shapes
At Precipitation, filtered, obtain Co (OH)2Precipitation；
(3) by Co (OH)2Dry 560min is deposited at 90 DEG C, and it is 0.1mm powder to be ground into grain size, takes 2.0gCo (OH)2
Pressed powder in 1000 DEG C of calcination 5h, obtains cobalt oxide electrode tabletting in air；
Step 3：Electrochemistry prepares
Wrap up cobalt oxide electrode tabletting with foamed nickel current collector, be then connected to cathode with molybdenum filament, graphite rod with it is stainless
Steel wire collector is connected to anode；
By fused salt raw materials of Ca Cl2Moisture removal is removed in drying, is placed in crucible, then crucible is put into reactor, cathode and sun
Pole is suspended in above fused salt raw material, and closed reactor is continually fed into argon gas into reactor by the air inlet on reactor, goes out
Gas port is discharged, and argon gas atmosphere is formed in reactor, electrolysis unit schematic diagram is shown in Fig. 1；
Step 4：Electrolysis
(1) by fused salt raw materials of Ca Cl2It is heated to fusion temperature and forms fused salt, the moisture generated in heating process is by argon gas band
It walks；Cathode and anode are inserted into fused salt, are constituted two electrode systems, are applied voltage in two electrodes, be electrolysed, and electrolysis is completed
Afterwards, the cathode after electrolysis is taken out, it is cooling, and be inserted into another cathode application voltage and continue to be electrolysed；Wherein, cathode and sun
The level interval of pole is 15mm, and application voltage is 2.0V, and permanent slot pressure electrolysis time is 10h；
(2) it by the cathode after cooling electrolysis, is put into the faintly acid clear water that pH value is 6.5, ultrasonic frequency 50kHZ
Cleaned by ultrasonic vibration, the salt of removal cathode surface attachment, obtained cathode is cobalt.
Embodiment 2
A kind of method that melten salt electriochemistry method recycles cobalt element in anode material of lithium battery, carries out according to the following steps：
Step 1：The dissolving of anode material of lithium battery
(1) the obtained lithium battery of recycling is subjected to discharge treatment, constant-current discharge 3A using charge and discharge instrument, discharge time is
40min then carries out artificial dismantling battery, isolated anode material of lithium battery and negative material；
(2) after crushing anode material of lithium battery, leachate is added, in 50 DEG C of heated at constant temperature 60min, while with stirring
It mixes, obtains leaching mixed liquor；Wherein, by solid-to-liquid ratio, anode material of lithium battery：Leachate=0.5g:5mL；Leachate is mole
A concentration of 6mol/L, H2SO4The H for being 40% with percentage by volume2O2Mixed liquor, by volume, molar concentration 6mol/L
H2SO4：The H that percentage by volume is 40%2O2=3:1；
(3) mixed liquor will be leached to be filtered, obtains filtrate；
Step 2：The preparation of cobalt oxide electrode tabletting
(1) the NaOH aqueous solutions that molar concentration is 1mol/L are added dropwise into filtrate, when pH value is 4.7, have Fe, Al to be formed
Precipitation, filtering, removal Fe, Al formed precipitation, obtain first-time filtrate；
(2) continue that the NaOH aqueous solutions that molar concentration is 1mol/L are added dropwise into first-time filtrate, when pH value is 9.2, Co
The Precipitation of formation, is filtered, and Co (OH) is obtained2Precipitation；
(3) by Co (OH)2Dry 500min is deposited at 100 DEG C, and it is 0.2mm powder to be ground into grain size, takes 2.0gCo
(OH)2Pressed powder in 900 DEG C of calcination 10h, obtains cobalt oxide electrode tabletting in air；
Step 3：Electrochemistry prepares
With embodiment 1, difference is：
(1) in step 3, SnO2Ceramics are connected to anode with stainless steel wire collector.
(2) in step 3, fused salt raw material is Li2CO3。
Step 4：Electrolysis
With embodiment 1, difference is：
(1) in step 4, the level interval of cathode and anode is 16mm, and application voltage is 2.1V, and permanent slot pressure electrolysis time is
8h；
(2) in step 4, cleaned by ultrasonic vibration, the faintly acid clear water that water for cleaning pH is 7, ultrasonic frequency is
10kHZ。
Other modes are identical.
Embodiment 3
A kind of method that melten salt electriochemistry method recycles cobalt element in anode material of lithium battery, carries out according to the following steps：
Step 1：The dissolving of anode material of lithium battery
(1) the obtained lithium battery of recycling is subjected to discharge treatment, constant-current discharge 3A using charge and discharge instrument, discharge time is
60min then carries out artificial dismantling battery, isolated anode material of lithium battery and negative material；
(2) after crushing anode material of lithium battery, leachate is added, in 80 DEG C of heated at constant temperature 10min, while with stirring
It mixes, obtains leaching mixed liquor；Wherein, by solid-to-liquid ratio, anode material of lithium battery：Leachate=1g:20mL；Leachate is mole dense
Degree is 2mol/L, H2SO4The H for being 20% with percentage by volume2O2Mixed liquor, by volume, molar concentration 2mol/L
H2SO4：The H that percentage by volume is 20%2O2=4:1；
(3) mixed liquor will be leached to be filtered, obtains filtrate；
Step 2：The preparation of cobalt oxide electrode tabletting
(1) the NaOH aqueous solutions that molar concentration is 3mol/L are added dropwise into filtrate, when pH value is 8, have Fe, Al to be formed
Precipitation, filtering, the precipitation that removal Fe, Al are formed obtain first-time filtrate；
(2) continue that the NaOH aqueous solutions that molar concentration is 3mol/L are added dropwise into first-time filtrate, when pH value is 10, Co shapes
At Precipitation, filtered, obtain Co (OH)2Precipitation；
(3) by Co (OH)2Dry 600min is deposited at 100 DEG C, and it is 0.1mm powder to be ground into grain size, takes 2.0gCo
(OH)2Pressed powder in 1000 DEG C of calcination 5h, obtains cobalt oxide electrode tabletting in air；
Step 3：Electrochemistry prepares
With embodiment 1, difference is：
(1) in step 3, Ni based alloys are connected to anode with stainless steel wire collector.
(2) in step 3, fused salt raw material is NaOH.
Step 4：Electrolysis
With embodiment 1, difference is：
(1) in step 4, the level interval of cathode and anode is 20mm, and application voltage is 2.0V, and permanent slot pressure electrolysis time is
12h；
(2) in step 4, cleaned by ultrasonic vibration, the faintly acid clear water that water for cleaning pH is 5, ultrasonic frequency 5kHZ.
Other modes are identical.
Embodiment 4
A kind of method that melten salt electriochemistry method recycles cobalt element in anode material of lithium battery, with embodiment 1, difference exists
In：
Step 3：Electrolysis prepares
(1) in step 3, Ni based alloys are connected to anode with stainless steel wire collector.
(2) in step 3, fused salt raw material is Na2CO3And K2CO3, the two mass ratio is 1:1.
Step 4：Electrolysis
With embodiment 1, difference is：
(1) in step 4, the level interval of cathode and anode is 10mm, and application voltage is 2.0V, and permanent slot pressure electrolysis time is
10h；
(2) in step 4, cleaned by ultrasonic vibration, the faintly acid clear water that water for cleaning pH is 6, ultrasonic frequency is
100kHZ。
Other modes are identical.
Embodiment 5
A kind of method that melten salt electriochemistry method recycles cobalt element in anode material of lithium battery, with embodiment 1, difference exists
In：
(1) in step 3, fused salt raw material is CaCl2And LiCl, the two atom number ratio are Li：Ca=0.65:0.35.
Other modes are identical.
Embodiment 6
A kind of method that melten salt electriochemistry method recycles cobalt element in anode material of lithium battery, with embodiment 1, difference exists
In：
(1) in step 3, fused salt raw material is MgCl2And Na2CO3, the two mass ratio is 1:1.
Other modes are identical.
Claims (10)
1. a kind of method of cobalt element in melten salt electriochemistry method recycling anode material of lithium battery, which is characterized in that according to the following steps
It carries out：
Step 1：The dissolving of anode material of lithium battery
(1) it after lithium battery being carried out discharge treatment, is disassembled, isolated anode material of lithium battery and negative material；
(2) after crushing anode material of lithium battery, leachate is added, in 50~80 DEG C of 10~60min of heated at constant temperature, and meanwhile it is adjoint
Stirring obtains leaching mixed liquor；
Wherein, by solid-to-liquid ratio, anode material of lithium battery：Leachate=(0.5~1) g:(5~20) mL；
Leachate is the H that molar concentration is 2~6mol/L2SO4The H for being 20~40% with percentage by volume2O2Mixed aqueous solution,
By volume, molar concentration is 2~6mol/LH2SO4：The H that percentage by volume is 20~40%2O2=(3~5):1；
(3) mixed liquor will be leached to be filtered, obtains filtrate；
Step 2：The preparation of cobalt oxide electrode tabletting
(1) the NaOH aqueous solutions that molar concentration is 1~3mol/L are added dropwise into filtrate, when pH value is 4.7~8, there is Fe, Al shape
At Precipitation, filtering, removal Fe, Al formed precipitation, obtain first-time filtrate；
(2) continue that the NaOH aqueous solutions that molar concentration is 1~3mol/L are added dropwise into first-time filtrate, when pH value is 9.2~10.0
When, the Precipitation that Co is formed is filtered, obtains Co (OH)2Precipitation；
(3) by Co (OH)2Precipitation drying, grind into powder, tabletting, in air calcination obtain cobalt oxide electrode tabletting；
Step 3：Electrochemistry prepares
Cobalt oxide electrode tabletting is wrapped up with foamed nickel current collector, cathode, graphite rod and stainless steel wire are then connected to molybdenum filament
Collector is connected to anode；
Fused salt raw material stoving is removed into moisture removal, is placed in crucible, then crucible is put into reactor, cathode and anode are suspended in molten
Above salt raw material, closed reactor is continually fed into argon gas into reactor, forms argon gas atmosphere；
Step 4：Electrolysis
(1) fused salt raw material being heated to fusion temperature and forms fused salt, cathode and anode are inserted into fused salt, constitute two electrode systems,
Apply voltage in two electrodes, be electrolysed, after the completion of electrolysis, the cathode after electrolysis is taken out, it is cooling, and it is inserted into another the moon
Pole applies voltage and continues to be electrolysed；Wherein, the level interval of cathode and anode be 15 ± 5mm, apply voltage be 2.0~
2.1V, electrolysis time are 8~12h；
(2) by the cathode after cooling electrolysis, into the water, cleaned by ultrasonic vibration, the salt of removal cathode surface attachment obtains
Cathode be cobalt.
2. the method for cobalt element, feature exist in melten salt electriochemistry method recycling anode material of lithium battery as described in claim 1
In, in (1) of the step 1, the discharge treatment, specially：Discharge treatment, constant-current discharge are carried out using charge and discharge instrument
3A, discharge time >=30min.
3. the method for cobalt element, feature exist in melten salt electriochemistry method recycling anode material of lithium battery as described in claim 1
In in (3) of the step 2, the drying is to dry 500~600min in air at 90~100 DEG C.
4. the method for cobalt element, feature exist in melten salt electriochemistry method recycling anode material of lithium battery as described in claim 1
In in (3) of the step 2, described is ground to, and obtains the Co (OH) that grain size is 0.10~0.20mm2Powder.
5. the method for cobalt element, feature exist in melten salt electriochemistry method recycling anode material of lithium battery as described in claim 1
In in (3) of the step 2, the calcination is the calcination 1~for 24 hours in air at 900~1000 DEG C.
6. the method for cobalt element, feature exist in melten salt electriochemistry method recycling anode material of lithium battery as described in claim 1
In in the step 3, the graphite rod can also be SnO2Ceramics or Ni based alloys.
7. the method for cobalt element, feature exist in melten salt electriochemistry method recycling anode material of lithium battery as described in claim 1
In in the step 3, the fused salt raw material is molten chloride raw material, carbonation fused salt raw material, hydroxide fused salt original
The mixing of one or more of material.
8. the method for cobalt element, feature exist in melten salt electriochemistry method recycling anode material of lithium battery as claimed in claim 7
In, when for molten chloride raw material, specially CaCl2, LiCl, NaCl, KCl, MgCl2, BaCl2One or more of
Fused salt mixt；
When for carbonation fused salt raw material, specially Li2CO3, Na2CO3, K2CO3, CaCO3One or more of mixing it is molten
Salt；
When for hydroxide fused salt raw material, specially LiOH, NaOH, the fused salt mixt of one or more of KOH.
9. the method for cobalt element, feature exist in melten salt electriochemistry method recycling anode material of lithium battery as described in claim 1
In in the step 3, the argon gas is passed through by reactor air inlet, is discharged by reactor gas outlet, when discharge, will be melted
The moisture that salt generates is taken away.
10. the method for cobalt element, feature exist in melten salt electriochemistry method recycling anode material of lithium battery as described in claim 1
In in the step 4, the cleaned by ultrasonic vibration, water for cleaning is the faintly acid clear water of 5≤pH≤7；Ultrasonic wave frequency
Rate is 0.5kHZ~100kHZ.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN110611136A (en) * | 2019-09-09 | 2019-12-24 | 华北理工大学 | Method for recovering and preparing cobalt elementary substance from waste lithium battery by molten salt method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109167016A (en) * | 2018-09-05 | 2019-01-08 | 盐城市新能源化学储能与动力电源研究中心 | A kind of anode material for lithium-ion batteries and its preparation method and application |
| CN109706320A (en) * | 2019-01-29 | 2019-05-03 | 东北大学 | A kind of method that ethyl alcohol is Co and Li in the useless lithium battery of reducing agent hydrometallurgic recovery |
| CN109722538A (en) * | 2019-01-29 | 2019-05-07 | 东北大学 | A kind of method that cobalt and lithium in waste and old cobalt acid lithium battery are recycled in molten-salt electrolysis |
| CN109706320B (en) * | 2019-01-29 | 2020-03-31 | 东北大学 | Method for recovering Co and Li in waste lithium battery by wet process by taking ethanol as reducing agent |
| CN109722538B (en) * | 2019-01-29 | 2020-03-31 | 东北大学 | Method for recycling cobalt and lithium in waste lithium cobalt oxide battery through molten salt electrolysis |
| CN110611136A (en) * | 2019-09-09 | 2019-12-24 | 华北理工大学 | Method for recovering and preparing cobalt elementary substance from waste lithium battery by molten salt method |
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