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Battery making processes

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' 0o make slurry1 2rst 3eig" t"e active material as t"e table above Ball millingis used as mi!er "omogeni#er1 t"en put t"e ball in t"e 3eig" 4 0urn on t"e 3eig"/ Measure active material mass (g)* 0are5 Measure carbon black 3eig" as t"e table above Make sure to add t"e carbon

black on t"e side of t"e 3all so 3e can get t"e sample easier if it is too muc", 0are Add binder as table above Make sure to add t"e binder on t"e side of t"e

3all so 3e can get t"e sample easier if it is too muc"+ ut in #irconia ball into t"e ball milling ball6 (1 big ball to reduce particle

size, 3 small ball to mix the slurry )

- Mi! in t"e ball milling mac"ine 3it" 5& fre7uency for /&8*& minutes'&After mi!ing c"eck t"e slurry to make sure 3e get t"e rig"t viscosity (it

should looks like a lava molten) 9f t"e mi!ture is too t"ick t"en add more

nmp (3~5 drop per adding) t"en mi! some more''9f t"e viscosity is already good1 t"en move to t"e ne!t processes'Cut aluminum foil and spread in t"e glass board (add ethanol frst on the

board)

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'/Cut Cu foil and put on t"e aluminum foil (make it even using ethanol as

beore)'*$ry t"e foil 2rst before move to t"e ne!t step'5ut t"e slurry 3e :ust made onto t"e Cu foil and make sure 3e put everyt"ing

and t"ere is no 3aste',;se doctor blade 5& microns to make t"e slurry even (put some of t"e slurry

on t"e tip of eac" side of t"e blade)'Spread t"e slurry evenly on t"e Cu foil'+$ry t"e Cu foil in t"e dry oven4'-<as" ball1 spoon and #irconia 3it" 3ater and take t"e remaining using "and

4clean everyt"ing using et"anol 2rst or last

Heat rolling

' Cut t"e Cu foil covered 3it" slurry 4 place t"e Cu foil in bet3een stainless steel plate4

/ turn on t"e rolling mac"ine and "eat until '&&=C* >educe t"e gap until 8&/, mm (roll bot" side of t"e tuner tog"eter?)5 >oll t"e Cu foil couples of time until it is turn to mirror@is" (a bit reective)

surface ;sually it is a bit bent if done (about 58 times), Collect 3it" an aluminum foil pocket and store in t"e vacuum locker4 et t"e rolling mac"ine cooled do3n 2rst until /&=C (dont forget to turn oD

t"e Mac"ine after3ards??? Set timer if must?)

4clean everyt"ing using et"anol 2rst or last

Battery assembly

' unc" circle "ole to be used as an anode of t"e battery4 Store t"e remaining sample in t"e vacuum locker/ Collect t"e circular Cu foil and dried for a 3"ile* After dried 3eig" t"e circular foil and 3rote t"e number on t"e bo!5 Bring t"e bo! of Cu foil and et"anol into glove bo!, Eill t"e insertion c"amber 2rst before put in t"e sample and et"anol ut in t"e samples and et"anol+ Make sure t"e c"amber is close tig"tly and t"en vacuum again for & minutes- 0"e c"amber 3it" gas again'&Ne!t turn on t"e lamp in t"e glove bo!

''$ecrease t"e minimum tolerance of t"e pressure to @&5 from '5 a'ut on t"e glove 3"ile pressing gas out to make it easier to put on t"e gloves'/Cut and spread aluminum foil on t"e oor of t"e glove bo! (don!t be stingy,

cover as much "oor area as #e can)'*0ake t"e sample and et"anol from t"e c"amber'50ake some tissue to absorb e!cess electrolyte',0ake some electrolyte using pipet and put on t"e tissue

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'ut t"e i petri@dis under t"e "ole punc"er and cut some i metal (usually or

 punching 3 holes)'+Assemble t"e battery component as suc" orderF base@electrolyte (1~$ drops)@

active material@electrolyte(/8* drops)@separator@cascade@lit"ium@disk@ring@

cap'-ress t"e cap t"oroug"ly 3"ile covered 3it" tissue to prevent some

electrolyte leaking&ress t"e battery and collect in t"e sample bo!'Clean everyt"ing up4 and put t"e sample into t"e transfer c"amberut oD t"e gloves 3"ile pressing gas in/Set t"e pressure min tolerance to '5 a*0urn oD t"e lig"t

4clean everyt"ing using et"anol 2rst or last