JP5763399B2 - 高容量負極物質がコーティングされたスーパー導電性ナノ粒子を含む負極活物質及びこれを含むリチウム電池 - Google Patents
高容量負極物質がコーティングされたスーパー導電性ナノ粒子を含む負極活物質及びこれを含むリチウム電池 Download PDFInfo
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- JP5763399B2 JP5763399B2 JP2011092909A JP2011092909A JP5763399B2 JP 5763399 B2 JP5763399 B2 JP 5763399B2 JP 2011092909 A JP2011092909 A JP 2011092909A JP 2011092909 A JP2011092909 A JP 2011092909A JP 5763399 B2 JP5763399 B2 JP 5763399B2
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/134—Electrodes based on metals, Si or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1395—Processes of manufacture of electrodes based on metals, Si or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
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Description
膨脹黒鉛100gを500℃で1時間加熱して膨脹させた後、これより発生したガスをオーブンの排気口を通じて排気させた後、これから収得した結果物をエタノールに分散させ、ホモジナイザーを利用して10,000rpmで10分間粉砕した。これから収得した混合物をマイクロフルイダイザーを利用して追加粉砕した後、フィルタリング装置を利用してろ過した後、エタノールで洗浄して120℃のオーブンで乾燥させてスーパー導電性ナノ粒子粉末を収得した。
前記製造例1のスーパー導電性ナノ粒子粉末をSiCl4液体に浸漬させた後、300℃で乾燥及びアニーリング過程を2回以上反復した後、600℃で2時間焼成してフェーズを安定させた後、3回の洗浄及び乾燥工程を行ってスーパー導電性ナノ粒子粉末にSiを約1〜10nm厚さにコーティングさせた。コーティング後、粉末を球形化装置を利用してd50=15μmサイズに造粒化して負極活物質を完成した。
前記製造例1のスーパー導電性ナノ粒子粉末及びd50=300nmのSiを80:20の重量比で混合した後、球形化装置を利用してd50=15μmのサイズに造粒化して負極活物質を完成した。
前記製造例1のスーパー導電性ナノ粒子粉末を、球形化装置を利用してd50=15μmのサイズに造粒化した。前記球形化したスーパー導電性ナノ粒子、d50=300nmのSi、バインダーとしてPI、導電剤としてデンカ・ブラックを64:16:10:10重量比で混合し、溶媒としてN−メチルピロリドンを使用して負極活物質スラリーを製造した。
前記実施例1及び比較例1、2の電池に対して、常温(25℃)で20時間放置することで化成工程を行った。
21 第1多環ナノシート
22 第2多環ナノシート
23 第3多環ナノシート
24 第4多環ナノシート
25 第5多環ナノシート
26 第6多環ナノシート
27 第7多環ナノシート
A1 第1カーボンの位置
B1 第2カーボンの位置
100 リチウム電池
112 負極
113 セパレータ
114 正極
120 電池容器
140 封入部材
Claims (10)
- 高容量負極物質がコーティングされた複数のスーパー導電性ナノ粒子と、その他の物質と、前記高容量負極物質がコーティングされた複数のスーパー導電性ナノ粒子及び前記その他の物質の表面にあるピッチコーティングと、からなる負極活物質において、
前記スーパー導電性ナノ粒子は、
6個のカーボン原子が六角形状に連結されてなる環が互いに縮合されて一平面上に配列されている多環ナノシートn個が、前記一平面に対して垂直方向に沿って積層された構造を持ち、
前記nは2ないし100の整数であり、
前記n個の多環ナノシートのカーボンのうち第1カーボンと、前記n個の多環ナノシートのカーボンのうち第2カーボンとを、L 1 ≧L 2 になるように選択して(ここで、前記L 1 は、前記第1カーボンと前記第2カーボンとの距離を表し、前記L 2 は、前記n個の多環ナノシートのカーボンのうち前記第1カーボン及び第2カーボンを除外した任意の第3カーボンと、前記n個の多環ナノシートのカーボンのうち前記第1カーボン、第2カーボン及び第3カーボンを除外した任意の第4カーボンとの距離を表す)、前記第1カーボンをx軸、y軸及びz軸を持つ3次元座標系の原点A(0,0,0)に位置させる時、前記第2カーボンは座標B(a,b,c)を持ち、前記a及びbは互いに独立して10μm以下であり、前記cは100nm以下であり、
前記高容量負極物質のコーティングが、前記高容量負極物質がコーティングされた複数のスーパー導電性ナノ粒子の1個のそれぞれ全体を被覆していて、
前記その他の物質が、バインダー、溶媒、導電剤、及び、高容量負極物質がコーティングされていないスーパー導電性ナノ粒子の四種類の物質のうちの少なくとも一種類であり、
前記負極活物質の大きさは、3μmないし60μmである、負極活物質。 - 前記高容量負極物質は、Si、Ni、Al、Sn、Ge、Si合金、Ni合金、Al合金、Sn合金、Ge合金、Si酸化物、Ni酸化物、Al酸化物、Sn酸化物、Ge酸化物、Si合金酸化物、Ni合金酸化物、Al合金酸化物、Sn合金酸化物、Ge合金酸化物及びこれらの混合物からなる群から選択される請求項1に記載の負極活物質。
- 前記多環ナノシートの隣接カーボンは、互いにsp2結合によって連結された請求項1に記載の負極活物質。
- 前記多環ナノシートそれぞれの厚さは、カーボン原子粒径±0.1nmの範囲である請求項1に記載の負極活物質。
- 前記nは、2ないし10の整数である請求項1に記載の負極活物質。
- 正極活物質を含む正極と、
高容量負極物質がコーティングされた複数のスーパー導電性ナノ粒子と、その他の物質と、前記高容量負極物質がコーティングされた複数のスーパー導電性ナノ粒子及び前記その他の物質の表面にあるピッチコーティングと、からなる負極活物質を含む負極と、
電解液とを含むリチウム電池であって、
前記スーパー導電性ナノ粒子は、
6個のカーボン原子が六角形状に連結されてなる環が互いに縮合されて一平面上に配列されている多環ナノシートn個が、前記一平面に対して垂直方向に沿って積層された構造を持ち、
前記nは、2ないし100の整数であり、
前記n個の多環ナノシートのカーボンのうち第1カーボンと、前記n個の多環ナノシートのカーボンのうち第2カーボンとを、L 1 ≧L 2 になるように選択し(ここで、前記L 1 は、前記第1カーボンと前記第2カーボンとの距離を表し、前記L 2 は、前記n個の多環ナノシートのカーボンのうち前記第1カーボン及び第2カーボンを除外した任意の第3カーボンと、前記n個の多環ナノシートのカーボンのうち前記第1カーボン、第2カーボン及び第3カーボンを除外した任意の第4カーボンとの距離を表す)、前記第1カーボンをx軸、y軸及びz軸を持つ3次元座標系の原点A(0,0,0)に位置させる時、前記第2カーボンは座標B(a,b,c)を持ち、前記a及びbは互いに独立して10μm以下であり、前記cは100nm以下であり、
前記高容量負極物質のコーティングが、前記高容量負極物質がコーティングされた複数のスーパー導電性ナノ粒子の1個のそれぞれ全体を被覆していて、
前記その他の物質が、バインダー、溶媒、導電剤、及び、高容量負極物質がコーティングされていないスーパー導電性ナノ粒子の四種類の物質のうちの少なくとも一種類であり、
前記負極活物質の大きさは、3μmないし60μmである、リチウム電池。 - 前記高容量負極物質は、Si、Ni、Al、Sn、Ge、Si合金、Ni合金、Al合金、Sn合金、Ge合金、Si酸化物、Ni酸化物、Al酸化物、Sn酸化物、Ge酸化物、Si合金酸化物、Ni合金酸化物、Al合金酸化物、Sn合金酸化物、Ge合金酸化物及びこれらの混合物からなる群から選択される請求項6に記載のリチウム電池。
- 前記多環ナノシートの隣接カーボンは、互いにsp2結合によって連結された請求項6に記載のリチウム電池。
- 前記多環ナノシートそれぞれの厚さは、カーボン原子粒径±0.1nmの範囲である請求項6に記載のリチウム電池。
- 前記nは、2ないし10の整数である請求項6に記載のリチウム電池。
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CN104845760B (zh) * | 2015-03-30 | 2018-07-06 | 石家庄健达高科化工有限公司 | 一种高效环保的4a沸石浆料生产洗衣粉的方法 |
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