JP6016597B2 - リチウムイオン二次電池用正極の製造方法 - Google Patents
リチウムイオン二次電池用正極の製造方法 Download PDFInfo
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- H01M4/139—Processes of manufacture
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- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
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- H01M4/139—Processes of manufacture
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- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
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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
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Description
本実施の形態では、本発明の一態様に係るリチウムイオン二次電池用正極及びその作製方法について、図1及び図2を参照して説明する。図1に、正極の断面図を示し、図2に、正極の作製方法を説明するためのフローチャートを示す。
本実施の形態では、リチウムイオン二次電池の構造及びその製造方法について、図3及び図4を参照して説明する。
本発明の一態様に係るリチウムイオン二次電池は、電力により駆動する様々な電気機器の電源として用いることができる。
次に、電気機器の一例である携帯情報端末について、図7を用いて説明する。
さらに、電気機器の一例である移動体の例について、図8を用いて説明する。
101 正極集電体
102 正極活物質層
103 正極活物質
104 グラフェン
300 二次電池
301 正極缶
302 負極缶
303 ガスケット
304 正極
305 正極集電体
306 正極活物質層
307 負極
308 負極集電体
309 負極活物質層
310 セパレータ
401 容器
402 酸化グラフェン分散液
403 被形成物
404 導電体
405 容器
406 電解液
407 導電体
408 対極
500 二次電池
501 正極集電体
502 正極活物質層
503 正極
504 負極集電体
505 負極活物質層
506 負極
507 セパレータ
508 電解液
509 筐体
8000 表示装置
8001 筐体
8002 表示部
8003 スピーカー部
8004 リチウムイオン二次電池
8100 照明装置
8101 筐体
8102 光源
8103 リチウムイオン二次電池
8104 天井
8105 側壁
8106 床
8107 窓
8200 室内機
8201 筐体
8202 送風口
8203 リチウムイオン二次電池
8204 室外機
8300 電気冷凍冷蔵庫
8301 筐体
8302 冷蔵室用扉
8303 冷凍室用扉
8304 リチウムイオン二次電池
9033 留め具
9034 スイッチ
9035 電源スイッチ
9036 スイッチ
9038 操作スイッチ
9630 筐体
9631 表示部
9631a 表示部
9631b 表示部
9632a 領域
9632b 領域
9633 太陽電池
9634 充放電制御回路
9635 バッテリー
9636 DCDCコンバータ
9637 コンバータ
9638 操作キー
9639 ボタン
9700 電気自動車
9701 リチウムイオン二次電池
9702 制御回路
9703 駆動装置
9704 処理装置
Claims (8)
- 分散媒に酸化グラフェンを分散した後、正極活物質を添加して混練することで混合物を作製し、
前記混合物に結着剤を添加して混練することで正極ペーストを作製し、
前記正極ペーストを正極集電体に塗布し、
該正極ペーストに含まれる前記分散媒を蒸発させた後、前記酸化グラフェンを還元させてグラフェンを含む正極活物質層を前記正極集電体上に形成するリチウムイオン二次電池用正極の製造方法。 - 請求項1において、
該正極ペーストに含まれる前記酸化グラフェンを還元雰囲気において還元するリチウムイオン二次電池用正極の製造方法。 - 請求項1において
該正極ペーストに含まれる酸化グラフェンを減圧下において還元するリチウムイオン二次電池用正極の製造方法。 - 請求項1乃至3のいずれか一において、
前記混合物に結着剤を添加して混練する際に、さらに分散媒を添加するリチウムイオン二次電池用正極の製造方法。 - 請求項1乃至4のいずれか一において、
前記正極活物質、前記結着剤、及び前記酸化グラフェンの総量に対して、前記酸化グラフェンを2wt%以上3wt%以下添加する、リチウムイオン二次電池用正極の製造方法。 - 請求項1乃至5のいずれか一において、
前記正極活物質、前記結着剤、及び前記酸化グラフェンの総量に対して、前記正極活物質を93wt%以上96wt%以下添加する、リチウムイオン二次電池用正極の製造方法。 - 請求項1乃至6のいずれか一において、
前記正極活物質、前記結着剤、及び前記酸化グラフェンの総量に対して、前記結着剤を1wt%以上5wt%以下添加する、リチウムイオン二次電池用正極の製造方法。 - 請求項1乃至7のいずれか一において、
前記正極活物質として、平均粒径100nm以上500nm以下のリン酸鉄リチウムを用いる、リチウムイオン二次電池用正極の製造方法。
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