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US2024274881(NIPPON CATALYTIC CHEM IND [JP])
Preparation of Positive Electrode
【0142】
(正極の作製)
Acetylene black (AB, product name: Denka Black (registered trademark), manufactured by Denka Co., Ltd.), graphite (product number: SP270, manufactured by Nippon Graphite Industries, Co., Ltd.), and polyvinylidene fluoride (PVdF, product number: KF1120, manufactured by Kureha Corporation) were weighed, 3 parts by weight each, with respect to 100 parts by weight of LiNi1/3 Co1/3 Mn1/3 O2 (product number: MX7h, manufactured by Umicore) used as the ternary positive electrode active material, and were dispersed in N-methyl-2-pyrrolidone (NMP)
三元系正極活物質であるLiNi1/3Co1/3Mn1/3O2(ユミコア製、品番:MX7h)100重量部に対し、アセチレンブラック(AB、デンカ(株)製、製品名:デンカブラック(登録商標))、グラファイト(日本黒鉛工業(株)製、品番:SP270)、及びポリフッ化ビニリデン(PVdF、(株)クレハ製、品番:KF1120)をそれぞれ3重量部となるように秤量し、N-メチル-2-ピロリドン(NMP)中に分散させて
to prepare positive electrode mixture slurry.
正極合材スラリーを作製した。
US2024154114(TERAWATT TECH K K [JP])
Specifically, in a case where a positive electrode is prepared using a highly alkaline material such as Li6 CoO4 ,
具体的には、Li6CoO4のようなアルカリ性が高い材料を使用して正極を作製しようとすると、
a positive electrode mixture slurry is prepared by kneading with a binder such as polyvinylidene fluoride (PVDF) or the like,
ポリフッ化ビニリデン(PVDF)等のバインダーと混錬して正極合材スラリーを作製する際に、
Li6 CoO4 absorbs moisture in the atmosphere to cause a rapid increase in viscosity and/or gelation of the positive electrode mixture slurry. However,
Li6CoO4が大気中の水分を吸収することで、正極合材スラリーが急激な粘度上昇及び/又はゲル化を生じてしまうが、
when the lithium-containing compound represented by Li6 Mnx Co1-x O4 (0<x<1) is used, such problems are less likely to arise.
Li6MnxCo1-xO4(0<x<1)で表されるリチウム含有化合物はそのような問題が生じにくい。
WO2019131234(PANASONIC IP MAN CO LTD [JP])
[0021] The positive electrode is obtained by, for example,
【0020】
正極は、例えば、
applying a positive electrode mixture slurry including a positive electrode active material, a binder, a conductive agent, and the like onto the positive electrode current collector and drying the resultant, thereby forming a positive electrode active material layer on the positive electrode current collector,
正極活物質、結着材、導電材等を含む正極合材スラリーを正極集電体上に塗布・乾燥することによって、正極集電体上に正極活物質層を形成し、
and rolling the positive electrode active material layer.
当該正極活物質層を圧延することにより得られる。