公开(公告)号：EP2606525A1

公开(公告)日：2013-06-26

申请号：EP11716351.9

申请日：2011-04-11

申请人： Massachusetts Institute Of Technology

发明人： CEDER, Gerbrand ,  JAIN, Anubhav ,  HAUTIER, Geoffroy ,  KIM, Jae, Chul ,  KANG, Byoungwoo ,  DANIEL, Robert

IPC分类号： H01M4/58 ,  H01M10/052 ,  C01B25/45

CPC分类号： H01M4/131 ,  B02C17/1815 ,  B02C19/186 ,  B02C23/06 ,  C01B25/45 ,  H01M4/366 ,  H01M4/58 ,  H01M4/5805 ,  H01M4/5825 ,  H01M10/052 ,  Y02E60/122 ,  Y02P70/54

摘要： This invention relates generally to electrode materials, electrochemical cells employing such materials, and methods of synthesizing such materials. The electrode materials have a crystal structure with a high ratio of Li to metal M, which is found to improve capacity by enabling the transfer of a greater amount of lithium per metal, and which is also found to improve stability by retaining a sufficient amount of lithium after charging. Furthermore, synthesis techniques are presented which result in improved charge and discharge capacities and reduced particle sizes of the electrode materials.

公开(公告)号：EP2539276A1

公开(公告)日：2013-01-02

申请号：EP11707271.0

申请日：2011-02-22

申请人： Massachusetts Institute of Technology

发明人： CEDER, Gerbrand ,  CHEN, Hailong ,  DOE, Robert, E. ,  HAUTIER, Geoffroy ,  JAIN, Anubhar ,  KANG, Byoungwoo

IPC分类号： C01B25/45 ,  H01M4/58

CPC分类号： H01M4/525 ,  C01B25/16 ,  C01B25/45 ,  H01M4/505 ,  H01M4/5825 ,  H01M10/052 ,  H01M10/054 ,  Y02T10/7011

摘要： The present invention generally relates to carbophosphates and other compounds. Such compounds may be used in batteries and other electrochemical devices, or in other applications such as those described herein. One aspect of the invention is generally directed to carbophosphate compounds, i.e., compounds containing carbonate and phosphate ions. For example, according to one set of embodiments, the compound has a formula A
x (M)(PO
4 )
a (CO
3 )
b , where M comprises one or more cations. A may include one or more alkali metals, for example, lithium and/or sodium. In some cases, x is greater than about 0.1, a is between about 0.1 and about 5.1, and b is between about 0.1 and about 5.1. In certain embodiments, the compound may have a unit cell atomic arrangement that is isostructural to to unit cells of the minerals sidorenkite, bonshtedtite, bradleyite, crawfordite, or ferrotychite. In some embodiments, the compound may have a formula A
x (M)(YO
4 )
a (XO
3 )
b , where A comprises one or more alkali metals, M comprises one or more cations, X includes B, C, and/or N, and Y includes Si, P, As, S, V, Nb, Mo, and/or W. In some cases, x is greater than about 0.1, a is between about 0.1 and about 5.1, and b is between about 0.1 and about 5.1. Other aspects of the invention are generally directed to techniques for making or using such compounds, kits involving such compounds, and the like.

公开(公告)号：EP2111659A2

公开(公告)日：2009-10-28

申请号：EP08724849.8

申请日：2008-01-25

申请人： Massachusetts Institute of Technology

发明人： CEDER, Gerbrand ,  KANG, Byoungwoo

IPC分类号： H01M4/58 ,  C01D15/02 ,  C23C24/08 ,  C23C30/00

CPC分类号： C23C30/00 ,  C23C24/06 ,  C23C24/08 ,  C23C26/00 ,  H01M4/136 ,  H01M4/366 ,  H01M4/5825 ,  H01M10/0525

摘要： The present invention generally relates to unique coatings for use with energy storage particles, such as lithium oxide energy storage materials. The invention provides unique coatings for particles, unique particle/coating combinations, and unique methods for making coatings and/or coated particles. In one aspect of the invention, a particle is formed having a core and a coating. The particle may comprise a core having a material such as LiFePO4, and a coating. The particle may be formed, in some embodiments, by using a non-stoichiometric combination of salts or other precursors, and sintering the same to form particles. LiFePO4 may form as the core of the particle, while the remaining materials may form a coating around the LiFePO4. Typically, the LiFePO4 is crystalline while the coating is generally amorphous, and in some instances, the coating may prevent large crystals of LiFePO4 from forming. However, in other embodiments, a coating may be applied to a particle after formation of the particle to form a core/coating structure. The particles disclosed herein may have a relatively high energy capacity, and thus may find use in batteries and other energy storage devices. Other aspects of the invention relate to devices comprising such particles, methods of making such particles, kits for making such particles, methods of promoting the making or use of such particles, and the like.