JP2012216515A - リチウムイオン二次電池 - Google Patents
リチウムイオン二次電池 Download PDFInfo
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Abstract
【解決手段】正極と、負極と、正極及び負極の間に設けられる電解質とを有するリチウムイオン二次電池であって、正極は、正極集電体と、正極集電体上に設けられる正極活物質層とを有し、該正極活物質層は、グラフェンと、リチウム含有複合酸化物とを交互に有する。リチウム含有複合酸化物は、扁平形状を有する単結晶粒であり、扁平形状を有する単結晶粒は、b軸方向の長さがa軸方向及びc軸方向の長さより短い。また、リチウム含有複合酸化物は、単結晶粒のb軸方向が、正極集電体の表面と交差するように、正極集電体上に設けられる。
【選択図】図1
Description
本実施の形態では、本発明の一態様であるリチウムイオン二次電池の正極及びその作製方法について、図1乃至図3を用いて説明する。
本実施の形態では、正極集電体上に、固体電解質で充たされた正極活物質層を有する正極の作製方法について説明する。
本実施の形態では、リチウムイオン二次電池及びその作製方法について説明する。
本実施の形態では、実施の形態3で説明したリチウムイオン二次電池の応用形態について図7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リチウムイオン二次電池を、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8及び図9のブロック図を用いて説明する。なお、各ブロック図では、受電装置及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。
Claims (8)
- 正極集電体上に正極活物質層が設けられる正極と、
負極と、
前記正極及び前記負極の間に設けられる電解質とを有し、
前記正極活物質層において、グラフェンと、リチウム含有複合酸化物とが交互に積層し、
前記リチウム含有複合酸化物は、扁平形状を有する単結晶粒であり、
前記扁平形状を有する単結晶粒は、b軸方向の長さがa軸方向及びc軸方向の長さより短く、
前記リチウム含有複合酸化物は、前記単結晶粒のb軸方向が前記正極集電体の表面と交差するように、前記正極集電体上に設けられることを特徴とするリチウムイオン二次電池。 - 正極集電体上に正極活物質層が設けられる正極と、
負極と、
前記正極及び前記負極の間に設けられる電解質とを有し、
前記正極活物質層において、異なるグラフェンの間に複数のリチウム含有複合酸化物を有し、
前記リチウム含有複合酸化物は、扁平形状を有する単結晶粒であり、
前記扁平形状を有する単結晶粒は、b軸方向の長さがa軸方向及びc軸方向の長さより短く、
前記リチウム含有複合酸化物は、前記単結晶粒のb軸方向が前記正極集電体の表面と交差するように、前記正極集電体上に設けられることを特徴とするリチウムイオン二次電池。 - 請求項1または請求項2において、前記単結晶粒のb軸方向の長さは、5nm以上50nm以下であることを特徴とするリチウムイオン二次電池。
- 請求項1乃至請求項3のいずれか一項において、前記単結晶粒のb軸は、前記正極集電体の表面に対し60度以上90度以下で交差することを特徴とするリチウムイオン二次電池。
- 請求項1乃至請求項4のいずれか一項において、前記リチウム含有複合酸化物は異なるグラフェンの間で積層していることを特徴とするリチウムイオン二次電池。
- 請求項1乃至請求項5のいずれか一項において、前記リチウム含有複合酸化物は、オリビン型であることを特徴とするリチウムイオン二次電池。
- 請求項1乃至請求項6のいずれか一項において、前記リチウム含有複合酸化物は、一般式LiMPO4(Mは、Fe(II),Mn(II),Co(II),Ni(II)の一以上)で表されることを特徴とするリチウムイオン二次電池。
- 請求項1乃至請求項7のいずれか一項において、前記グラフェン及び前記リチウム含有複合酸化物の間にバインダーが満たされていることを特徴とするリチウムイオン二次電池。
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US (3) | US9059478B2 (ja) |
JP (3) | JP5848645B2 (ja) |
KR (3) | KR101954780B1 (ja) |
CN (2) | CN105742570B (ja) |
DE (1) | DE112012002563B4 (ja) |
WO (1) | WO2012132307A1 (ja) |
Cited By (8)
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JP2013073846A (ja) * | 2011-09-28 | 2013-04-22 | Sony Corp | リチウムイオン二次電池 |
JP2013140770A (ja) * | 2011-12-28 | 2013-07-18 | Qinghua Univ | 集電体、それを利用した電気化学電池用電極及び電気化学電池 |
JP2014110240A (ja) * | 2012-11-30 | 2014-06-12 | Ngk Insulators Ltd | 蓄電素子 |
JP2017063027A (ja) * | 2015-09-24 | 2017-03-30 | 寧徳時代新能源科技股▲分▼有限公司 | 正極シート及び該正極シートを備えるリチウムイオン電池 |
KR101736975B1 (ko) * | 2013-07-08 | 2017-05-18 | 삼성전자주식회사 | 다층 그래핀막, 다층 그래핀막을 전극으로 사용하는 에너지 저장 장치 및 다층 그래핀막과 에너지 저장 장치의 제조방법 |
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US11108037B2 (en) | 2016-12-30 | 2021-08-31 | Beijing Tunghsu Carbon Advanced Materials Technology Co., Ltd. | Method for preparing graphene/ternary material composite for use in lithium ion batteries and product thereof |
JP7181218B2 (ja) | 2016-12-30 | 2022-11-30 | ベイジン ドンシュー カーボン アドヴァンスト マテリアルズ テクノロジー カンパニー,リミテッド | リチウムイオン電池に使用するためのグラフェン/三元系材料複合体を調製する方法およびその製造物 |
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KR101954780B1 (ko) | 2019-03-06 |
CN105742570B (zh) | 2021-05-07 |
CN105742570A (zh) | 2016-07-06 |
KR20200083678A (ko) | 2020-07-08 |
JP6092989B2 (ja) | 2017-03-08 |
WO2012132307A1 (en) | 2012-10-04 |
KR102131859B1 (ko) | 2020-07-08 |
CN103443971A (zh) | 2013-12-11 |
KR20140027166A (ko) | 2014-03-06 |
US20150263343A1 (en) | 2015-09-17 |
CN103443971B (zh) | 2016-06-08 |
US20120244430A1 (en) | 2012-09-27 |
US20190165370A1 (en) | 2019-05-30 |
US10205160B2 (en) | 2019-02-12 |
US9059478B2 (en) | 2015-06-16 |
JP6377786B2 (ja) | 2018-08-22 |
JP2016028404A (ja) | 2016-02-25 |
DE112012002563B4 (de) | 2021-10-07 |
KR20190025046A (ko) | 2019-03-08 |
JP2017098270A (ja) | 2017-06-01 |
JP5848645B2 (ja) | 2016-01-27 |
US11101460B2 (en) | 2021-08-24 |
WO2012132307A9 (en) | 2013-04-25 |
DE112012002563T5 (de) | 2014-03-20 |
KR102250080B1 (ko) | 2021-05-07 |
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