MANUFACTURING METHOD OF CURRENT COLLECTOR OF NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY

• Main Authors: HONMA HIROAKI, TAKAHASHI AKIHISA, HASEGAWA MASAKI
• Format: Patent
• Language: English; Japanese
• Published: 19.11.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To manufacture a current collector 2 of a negative electrode for a lithium ion secondary battery having a copper film while being lightweight and without a problem such as a wet process.SOLUTION: A manufacturing method of a current collector of a negative electrode for a lithium ion secondary battery includes a modification step of modifying a film-forming surface 11 of a heat-resistant resin film 1, a first film formation step of forming a nickel-containing first alloy film on the film-forming surface 11 of the heat-resistant resin film 1 after the modification step, a second film formation step of forming a copper film on the surface of the first alloy film, and a third film formation step of forming a nickel-containing second alloy film on the copper film surface, and each of the first to third film formation steps is performed by a PVD method.SELECTED DRAWING: Figure 1 【課題】銅膜を有するリチウムイオン二次電池用負極の集電体２を、軽量なものとしつつ、ウェットプロセスのような問題がなく製造する。【解決手段】耐熱性樹脂フィルム１の被成膜面１１を改質処理する改質工程と、改質処理後の耐熱性樹脂フィルム１の被成膜面１１にニッケル含有の第１合金膜を成膜する第１の成膜工程と、第１合金膜表面に銅膜を成膜する第２の成膜工程と、銅膜表面にニッケル含有の第２合金膜を成膜する第３の成膜工程とを含み、第１〜第３の各成膜工程をＰＶＤ法により行う。【選択図】図１