JP6561030B2 - リチウムイオン電池負極の安定化 - Google Patents
リチウムイオン電池負極の安定化 Download PDFInfo
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- H01M4/46—Alloys based on magnesium or aluminium
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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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
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Description
本特許出願は、2012年2月6日出願の「Liイオン電池負極の安定化」と題する米国非仮出願第13/366,594号、及び2011年2月7日出願の「シリコン負極含有Liイオン電池の安定化」と題する米国仮出願第61/440,104号の優先権を主張するものであり、これらの号は本明細書において参照により明示的に援用される。
本発明は、全般的にエネルギー貯蔵装置、さらに具体的にはリチウムイオン電池技術に関する。
リチウムイオン(Liイオン)電池は、一部はその比較的高いエネルギー密度、軽量、及び長寿命の可能性のため、家庭用電化製品において広く使用されている。実際、Liイオン電池は多くの応用分野において、本質的にニッケル−カドミウム及びニッケル水素電池に取って代わってきた。商業的には益々普及しているにもかかわらず、Liイオン電池のさらなる開発が、特に低及びゼロ排気ハイブリッド電気自動車又は完全電気自動車、家庭用電化製品、エネルギー効率のよい貨物船及び機関車、航空宇宙、並びに送配電における潜在的応用のために必要とされている。かかる高出力用途には、既存のLiイオン電池において使用されるものよりも比容量の高い電極が必要となる。
Si+6HF+h+→SiF6 2−+6H++3e− (式1)
Si+6HF+h+→SiF6 2−+4H++H2+e− (式2)
[式中、h+は、正孔カチオンを表わし、かつe−は、電子注入を表わす]に従って進行し得る。結果として生じる活物質(この場合はシリコン)の喪失と、その表面積の増大(孔形成及び表面の粗面化に起因する)とが、負極容量を低下させることが示された。
Claims (7)
- 複数の粒子を含む、リチウムイオンの挿入及び脱離のためのLiイオン電池負極であって、前記粒子のそれぞれが、
シリコン(Si)、ゲルマニウム(Ge)、スズ(Sn)、チタン(Ti)、アルミニウム(Al)、又はマグネシウム(Mg)の少なくとも1つを含んでなる活物質コアと、
前記活物質コアを全体的に包み込む保護コーティングシェルと、を含んでなり、
前記保護コーティングシェルが、フッ化水素酸の浸透に対し抵抗性である材料を含んでなり、
前記フッ化水素酸の浸透に対し抵抗性である材料が、ポリマー、金属酸化物、金属フッ化物、炭素、セラミック又はそれらの組合せを含んでなる、Liイオン浸透性及び電解質溶媒非浸透性の材料であり、
前記活物質コアが脱リチオ化状態にあるとき、リチオ化の間の前記活物質コアにおける体積変化に適応させるために、複数の孔が、前記保護コーティングシェルの内側の、炭素を含む内側保護層に配置されている、Liイオン電池負極。 - 前記保護コーティングシェルが、リチオ化の間の伸張及び脱リチオ化の間の収縮が可能な、可撓性の材料である、請求項1に記載のLiイオン電池負極。
- 前記保護コーティングシェルが、機械的に安定でかつ可塑的に変形可能である、請求項1に記載のLiイオン電池負極。
- 前記内側保護層が炭素を含む、請求項1から3のいずれか1項に記載のLiイオン電池負極。
- 前記保護コーティングシェル上に配置された、付加的なポリマー又は炭素導電層をさらに含んでなる、請求項3に記載のLiイオン電池負極。
- 前記保護コーティングシェルが、固体−電解質界面層を形成するための機械的に安定な表面を提供する、請求項3に記載のLiイオン電池負極。
- 請求項1に記載の前記Liイオン電池負極を含んでなる、Liイオン電池。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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US201161440104P | 2011-02-07 | 2011-02-07 | |
US61/440,104 | 2011-02-07 | ||
US13/366,594 US9786947B2 (en) | 2011-02-07 | 2012-02-06 | Stabilization of Li-ion battery anodes |
US13/366,594 | 2012-02-06 |
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JP2015238465A Division JP2016076499A (ja) | 2011-02-07 | 2015-12-07 | リチウムイオン電池負極の安定化 |
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JP2017063047A JP2017063047A (ja) | 2017-03-30 |
JP6561030B2 true JP6561030B2 (ja) | 2019-08-14 |
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JP2013552727A Active JP6089261B2 (ja) | 2011-02-07 | 2012-02-07 | リチウムイオン電池負極の安定化 |
JP2015238465A Pending JP2016076499A (ja) | 2011-02-07 | 2015-12-07 | リチウムイオン電池負極の安定化 |
JP2016229167A Active JP6561030B2 (ja) | 2011-02-07 | 2016-11-25 | リチウムイオン電池負極の安定化 |
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JP2013552727A Active JP6089261B2 (ja) | 2011-02-07 | 2012-02-07 | リチウムイオン電池負極の安定化 |
JP2015238465A Pending JP2016076499A (ja) | 2011-02-07 | 2015-12-07 | リチウムイオン電池負極の安定化 |
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Country | Link |
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US (5) | US9786947B2 (ja) |
EP (2) | EP2673822B8 (ja) |
JP (3) | JP6089261B2 (ja) |
CN (2) | CN109616661A (ja) |
WO (1) | WO2012109218A2 (ja) |
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