JP6913963B2 - 複合負極材の製造方法 - Google Patents
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- 239000002131 composite material Substances 0.000 title claims description 53
- 239000007773 negative electrode material Substances 0.000 title claims description 51
- 238000004519 manufacturing process Methods 0.000 title claims description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 118
- 239000003575 carbonaceous material Substances 0.000 claims description 80
- 229910052799 carbon Inorganic materials 0.000 claims description 63
- 230000035939 shock Effects 0.000 claims description 61
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 53
- 229910052710 silicon Inorganic materials 0.000 claims description 53
- 239000010703 silicon Substances 0.000 claims description 53
- 229910002804 graphite Inorganic materials 0.000 claims description 42
- 239000010439 graphite Substances 0.000 claims description 42
- 239000011856 silicon-based particle Substances 0.000 claims description 40
- 239000002245 particle Substances 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 24
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 21
- 239000004917 carbon fiber Substances 0.000 claims description 21
- 239000002994 raw material Substances 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 7
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 6
- 239000002041 carbon nanotube Substances 0.000 claims description 6
- 229910021389 graphene Inorganic materials 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000003618 dip coating Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 3
- 239000007833 carbon precursor Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 229910021382 natural graphite Inorganic materials 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 16
- 239000005543 nano-size silicon particle Substances 0.000 description 11
- 239000002105 nanoparticle Substances 0.000 description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 8
- 229910052744 lithium Inorganic materials 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 7
- 239000011149 active material Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 229910021383 artificial graphite Inorganic materials 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- -1 lithium hexafluorophosphate Chemical compound 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
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Description
電気放射によって製造された炭素繊維と325メッシュ級のマイクロシリコン粒子を用いて複合負極材を製造した。325メッシュ級のマイクロシリコン粒子は、市販の製品を用い、42μm未満の粒子径を有する粒子で構成されているゆえにマイクロ単位である。5%の濃度でマイクロシリコン粒子が分散されたエタノールにディップコーティングした炭素繊維に対して炭素熱衝撃を加え、炭素熱衝撃は120Vの電圧条件で53Aの電流を1秒間印加した。
膨脹黒鉛シートと325メッシュ級のマイクロシリコン粒子を用いて複合負極材を製造した。6%の濃度でマイクロシリコン粒子が分散されたフェノール樹脂にディップコーティングした後、大気雰囲気下で24時間乾燥処理した後、350℃まで窒素雰囲気で残留炭素が固形成分として残っていることができるように安定化処理した後、膨脹黒鉛シートに炭素熱衝撃を加え、炭素熱衝撃条件は220Vの電圧条件で95Aの電流を30秒間印加した。急速加熱された黒鉛シートの熱エネルギーがシリコン粒子に十分に伝達され得るように、残留炭素が固形成分として残っている状態でシリコン粒子が黒鉛シートと接触するように構成した。
天然黒鉛と325メッシュ級のマイクロシリコン粒子を用いて複合負極材を製造した。
天然黒鉛と325メッシュ級のマイクロシリコン粒子を用いて複合負極材を製造し、実施例3とは天然黒鉛とマイクロシリコン粒子を7:3の重量比で混合した点でのみ異なっており、残りの過程は同一に行った。
Claims (9)
- 炭素系物質と固体状態のシリコンを原料物質として準備して混合する準備工程と、
炭素系物質を1秒間〜50秒間急速に加熱し、加熱された炭素系物質により固体状態のシリコンが溶融されて炭素系物質の表面に粒子状に分散添着される炭素熱衝撃工程とを含み、
前記炭素熱衝撃工程で炭素系物質の表面に添着されて成長するシリコン粒子の大きさを調節する、複合負極材の製造方法。 - 前記炭素熱衝撃工程で10秒以内の時間に炭素系物質が1400℃以上に加熱されるように炭素系物質を加熱することを特徴とする請求項1に記載の複合負極材の製造方法。
- 前記炭素系物質が黒鉛、グラフェン酸化物、炭素ナノチューブ、炭素繊維のうちの1つ以上であることを特徴とする請求項1に記載の複合負極材の製造方法。
- 前記炭素系物質が黒鉛であり、前記準備工程が黒鉛とシリコン粒子を混合した後にプレス成形して行われることを特徴とする請求項1に記載の複合負極材の製造方法。
- 前記炭素系物質が膨脹黒鉛シートであり、前記準備工程が膨脹黒鉛シートをシリコン粒子が分散された液体にディップコーティングして行われることを特徴とする請求項1に記載の複合負極材の製造方法。
- 前記炭素系物質が炭素繊維であり、前記準備工程が炭素繊維をシリコン粒子が分散された液体にディップコーティングして行われることを特徴とする請求項1に記載の複合負極材の製造方法。
- 炭素系物質の表面に添着されたシリコン粒子の直径が100nm以下になるように炭素熱衝撃工程を制御することを特徴とする請求項1に記載の複合負極材の製造方法。
- 前記炭素熱衝撃工程の後に、
炭素系物質に残っている熱エネルギーによって炭素系物質の表面に添着されたシリコン粒子が成長できないように冷却する冷却工程を行うことを特徴とする請求項1に記載の複合負極材の製造方法。 - 前記炭素熱衝撃工程の後に、
シリコン粒子が表面に添着された炭素系物質を粉砕した後、炭素プリカーサーでコーティングして直径が15〜20μm範囲の球形に製造する工程を更に行うことを特徴とする請求項1に記載の複合負極材の製造方法。
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KR1020190131584A KR102133961B1 (ko) | 2019-04-05 | 2019-10-22 | 복합 음극재의 제조 방법 및 리튬이차전지용 복합 음극재 |
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CN112397705B (zh) * | 2021-01-18 | 2021-05-18 | 湖南雅城新材料有限公司 | 一种锂离子电池负极材料及其制备方法与应用 |
CN115036496B (zh) * | 2021-03-05 | 2024-02-13 | 中国科学院过程工程研究所 | 一种硅纳米线基柔性自支撑电极材料及其制备方法 |
CN113967741B (zh) * | 2021-10-11 | 2023-01-31 | 天津大学 | 快速合成具有大量位错的铂纳米颗粒的方法 |
CN114744173B (zh) * | 2022-04-08 | 2023-07-18 | 滨州学院 | 一种膨胀石墨/硅/碳复合电极材料及其制备方法与应用 |
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