退役鋰離子電池回收與資源化技術(shù)Recycling

ofspent

lithium-ion

batteries:

a

review

ofcurrent

processes

andtechnologies1I

行業(yè)發(fā)展與研究背景II

鋰離子電池回收與再生技術(shù)III北理工課題組電池回收最新進(jìn)展IV總結(jié)與展望目錄CategoriesMaterialsPropertiesPotentialenvironmentalpollutionCathodematerialLiCoO2/LiMn2O4/LiNiO2/LiNiCoMnO2Reacts

with

water,

acids,

reducing

agents

or

strongoxidizing

agents

(hydrogen

peroxide,

chlorate,

etc.)to

produce

harmful

metal

oxides.Heavy

metal

pollution

raisestheenvironmental

pHAnode

materialCarbon

material/graphite,

lithium

intercalationin

case

of

fire

or

high

temperature,dust

can

explodeand

reactwith

strongacidand

strong

alkali

toproducegasessuchas

CO

and

CO2.The

CO

and

solid

dust

particlesproduced

by

the

combustion

of

theanode

materialcontaminatetheair.ElectrolyteLiPF6/LiBF4/LiAsF6It

is

highly

corrosiveandcan

produce

HFwhenexposed

to

water,

and

can

be

oxidized

to

producetoxic

substances

such

as

P2O5

,

Li2O,

B2O3Fluorine

pollution

changesthe

pHofthe

environment,and

the

toxic

gasgenerated

pollutestheair

andstimulates

the

human

body

throughthe

skin

and

breathing.ElectrolytesolventEthylene

carbonate/Propylene

carbonate/Dimethyl

carbonateThe

hydrolyzate

producesaldehydes

andacids,which

can

produce

CO,CO2

,

etc.Organic

matter

such

as

aldehydes,

ketones,and

methanolSeparatorPP/PECombustion

can

produce

CO,aldehyde,

etc.Organic

pollutionBinderPVDF

、VDF

、EPDIt

can

reactwith

fluorine,fumingsulfuricacid,

strongalkali,alkali

metal,and

decompose

by

heat

toproduce

HF.Thermaldecompositionproduces

HFandfluorine

pollution-Aprocess2Diagrammaticsketchofreaction

mechanismPossiblestructuresofthe

reaction

productsI.梯次利用——

Howto

reusethese

remaining

powerfor

a

power

battery

that

also

has80%

power.II.安全拆解——Avoidsafety

accidents

such

asfire

and

explosion,

and

at

the

sametimetake

intoaccountautomationefficiency

issues.III.材料純度——Getgood

impurityremoval

effect

by

simple

methodIV.二次污染——Avoidtoxicand

harmfulgasesandwaste

liquids,

etc.V.復(fù)雜材料——Thediversityofcathodematerials

makes

recovery

difficult,

lessrecoveryforthe

negativeelectrodeandelectrolyteVI.環(huán)境經(jīng)濟(jì)效應(yīng)——Effectively

improvetheeconomicsand

reflectingtheenvironmentalbenef