JP2013054878A - 電極の作製方法および蓄電装置 - Google Patents
電極の作製方法および蓄電装置 Download PDFInfo
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Abstract
【解決手段】蓄電装置用の電極において、集電体と、集電体上の、第1の活物質層と、該第1の活物質層上の、酸化ニオブを有する粒子および粒状の活物質を含む第2の活物質層と、を有する電極を用いることにより、蓄電装置の充放電サイクル特性およびレート特性を向上させることができる。さらに、粒状の活物質と酸化ニオブを有する粒子が接することによって、粒状の活物質が物理的に固定され、蓄電装置の充放電に伴う活物質の膨張または収縮による微粉化、集電体からの剥がれ等の劣化を抑制することができる。
【選択図】図1
Description
本実施の形態では、本発明の一態様である蓄電装置の電極およびその作製方法について、図1および図2を用いて説明する。
ここで、酸化ニオブを有する粒子109の作製方法について説明する。まず、ニオブアルコキシド(Nb(OCH2CH3)5)に対して、安定化剤のアセト酢酸エチルと溶媒のトルエンを加えて撹拌して溶液を作製する。次に、該溶液中のニオブアルコキシドが大気中の水分と徐々に反応し、化学式1に示す加水分解反応によって縮合してゲル化する。
次に、図1に示した電極の作製方法について、図2を参照して説明する。
ここで、スラリーの作製方法について説明する。上述したように、ゾルゲル法などによって作製された酸化ニオブを有する粒子、粒状の活物質、バインダ、導電助剤、粘度調整剤を混合・撹拌して、粒状の活物質表面に酸化ニオブを有する粒子が付着したスラリーを作製する。スラリーの調製は、バインダを含ませた溶媒に導電助剤を分散させ、そこに活物質を混ぜる。このとき分散性向上のために、溶媒の量を抑え固練りを行うことが好ましい。その後、溶媒を追加し、スラリーを作製する。活物質、導電助剤、バインダおよび溶媒の割合は適宜調整することができるが、導電助剤とバインダの比率が高いほうが、活物質量当たりの電池性能を上げることができる。
本実施の形態では、蓄電装置の構造について、図3を用いて説明する。
本実施の形態では、実施の形態2で説明した蓄電装置の応用形態について図4を用いて説明する。
本実施の形態では、本発明の一態様に係る蓄電装置の一例である二次電池を、無線給電システム(以下、RF給電システムと呼ぶ。)に用いた場合の一例を、図5および図6のブロック図を用いて説明する。なお、各ブロック図では、受電装置および給電装置内の構成要素を機能ごとに分類し、互いに独立したブロックとして示しているが、実際の構成要素は機能ごとに完全に切り分けることが困難であり、一つの構成要素が複数の機能に係わることもあり得る。
101 集電体
102 第1の活物質層
103 活物質
109 酸化ニオブを有する粒子
151 蓄電装置
153 外装部材
155 蓄電セル
157 端子部
159 端子部
163 負極
165 正極
167 セパレータ
169 電解質
171 負極集電体
173 負極活物質層
175 正極集電体
177 正極活物質層
179 負極活物質層
300 自動車
302 蓄電装置
600 受電装置
601 受電装置部
602 受電装置用アンテナ回路
603 信号処理回路
604 二次電池
605 整流回路
606 変調回路
607 電源回路
610 電源負荷部
700 給電装置
701 給電装置用アンテナ回路
702 信号処理回路
703 整流回路
704 変調回路
705 復調回路
706 発振回路
1301 モーターボート
1302 蓄電装置
1311 電動車椅子
1312 蓄電装置
Claims (6)
- 集電体と、
前記集電体上の、第1の活物質層と、
前記第1の活物質層上の、酸化ニオブを有する粒子および粒状の活物質を含む第2の活物質層と、
を有する電極を用いることを特徴とする蓄電装置。 - 集電体と、
前記集電体上の、第1の活物質層と、
前記第1の活物質層上の、酸化ニオブを有する粒子および粒状の活物質を有する第2の活物質層と、を有する負極と、
前記負極と接して形成される電解質と、
前記電解質を介して、前記負極と対向する正極と、を有することを特徴とする蓄電装置。 - 請求項1または請求項2において、
前記酸化ニオブを有する粒子と、前記粒状の活物質と、は接していることを特徴とする蓄電装置。 - 請求項1乃至請求項3のいずれか一項において、
前記第1の活物質層および前記活物質はシリコン、スズ、アルミニウムまたはゲルマニウムから選択された一種以上の材料を有することを特徴とする蓄電装置。 - 集電体上に第1の活物質層を形成し、
前記第1の活物質層上に、バインダ、導電助剤、酸化ニオブを有する粒子および粒状の活物質を有するスラリーを塗布した後に、焼成し、
前記酸化ニオブを有する粒子を、ゾルゲル法によって作製することを特徴とする電極の作製方法。 - 請求項5において、
前記第1の活物質層および前記活物質はシリコン、スズ、アルミニウムまたはゲルマニウムから選択された一種以上の材料を有することを特徴とする電極の作製方法。
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JP2011191516A JP2013054878A (ja) | 2011-09-02 | 2011-09-02 | 電極の作製方法および蓄電装置 |
US13/596,189 US9799461B2 (en) | 2011-09-02 | 2012-08-28 | Power storage device and method for manufacturing electrode |
KR1020120095334A KR101921337B1 (ko) | 2011-09-02 | 2012-08-30 | 전극의 제작 방법 및 축전 장치 |
CN201210317652.9A CN102983335B (zh) | 2011-09-02 | 2012-08-31 | 电极的制造方法及蓄电装置 |
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JP2015179777A Division JP6167147B2 (ja) | 2015-09-11 | 2015-09-11 | リチウムイオン二次電池の作製方法 |
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JP6035013B2 (ja) | 2011-08-30 | 2016-11-30 | 株式会社半導体エネルギー研究所 | 電極の作製方法 |
US9384904B2 (en) | 2012-04-06 | 2016-07-05 | Semiconductor Energy Laboratory Co., Ltd. | Negative electrode for power storage device, method for forming the same, and power storage device |
JP6216154B2 (ja) | 2012-06-01 | 2017-10-18 | 株式会社半導体エネルギー研究所 | 蓄電装置用負極及び蓄電装置 |
DE112013005307T5 (de) | 2012-11-07 | 2015-07-23 | Semiconductor Energy Laboratory Co., Ltd. | Elektrode für Energiespeichervorrichtung, Energiespeichervorrichtung und Herstellungsverfahren der Elektrode für Energiespeichervorrichtung |
CN111403683B (zh) | 2014-03-13 | 2024-02-23 | 株式会社半导体能源研究所 | 电极、蓄电装置、电子设备、以及电极的制造方法 |
JP2016028408A (ja) * | 2014-03-24 | 2016-02-25 | パナソニックIpマネジメント株式会社 | 蓄電素子及び蓄電素子の製造方法 |
JP6664184B2 (ja) | 2014-10-15 | 2020-03-13 | 株式会社半導体エネルギー研究所 | 電極、及び電極の作製方法 |
US10707526B2 (en) | 2015-03-27 | 2020-07-07 | New Dominion Enterprises Inc. | All-inorganic solvents for electrolytes |
CN106784987A (zh) * | 2015-11-23 | 2017-05-31 | 深圳市比克动力电池有限公司 | 锂离子电池负极材料、负极和锂离子电池 |
US10707531B1 (en) | 2016-09-27 | 2020-07-07 | New Dominion Enterprises Inc. | All-inorganic solvents for electrolytes |
US11223035B2 (en) * | 2017-11-27 | 2022-01-11 | Global Graphene Group, Inc. | Graphene-enabled niobium-based composite metal oxide as an anode active material for a lithium-ion battery |
US11774376B2 (en) * | 2019-12-26 | 2023-10-03 | Canon Kabushiki Kaisha | Power supply unit and radiation imaging apparatus including the same |
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