公开(公告)号：US10319989B2

公开(公告)日：2019-06-11

申请号：US15905017

申请日：2018-02-26

Applicant: Massachusetts Institute of Technology

Inventor： Xinwei Chen ,  Jiayan Luo ,  Yet-Ming Chiang

IPC: H01M4/1397 ,  H01M4/136 ,  H01M4/04 ,  H01M4/38 ,  H01M4/62 ,  H01M10/052

Abstract: Embodiments described herein relate generally to lithium sulfur batteries and methods of producing the same. As described herein, preventing coarsening of sulfur during the well-known melt-diffusion processing of cathodes allows a high areal capacity of 10.7 mAh/cm2 at current density of 3.4 mA/cm2 (C-rate of 1/5 h−1). The addition of a lithium salt, such as LiTFSI, prior to melt-diffusion can prevent coarsening of molten sulfur and allows creation of a sulfur electrode with a high concentration of triple-phase junctions for electrochemical reaction. In some embodiments, approximately 60-70% utilization of the theoretical capacity of sulfur is reached at a high loading (e.g., greater than 7.5 mg S/cm2). The electrodes are prepared in lean-electrolyte environment of 3 mlelectrolyte/gsulfur (˜70 vol % of electrolyte in the electrode) for high areal capacity in Li—S batteries.

公开(公告)号：US20180197686A1

公开(公告)日：2018-07-12

申请号：US15915464

申请日：2018-03-08

Applicant: Massachusetts Institute of Technology

Inventor： Brian Richmond Solomon ,  Xinwei Chen ,  Yet-Ming Chiang ,  Kripa Kiran Varanasi

IPC: H01G9/145 ,  H01M12/06 ,  H01M10/36 ,  H01M10/052 ,  H01M8/18 ,  H01M8/12 ,  H01M8/02 ,  H01G9/035 ,  H01G9/048 ,  H01M10/02 ,  C09D5/03

CPC classification number: H01G9/145 ,  C09D5/037 ,  H01G9/035 ,  H01G9/048 ,  H01G11/06 ,  H01G11/26 ,  H01G11/38 ,  H01G11/64 ,  H01M8/02 ,  H01M8/12 ,  H01M8/188 ,  H01M10/02 ,  H01M10/052 ,  H01M10/36 ,  H01M12/06 ,  Y02E60/13

Abstract: In certain embodiments, the invention relates to an electrochemical device having a liquid lubricant impregnated surface. At least a portion of the interior surface of the electrochemical device includes a portion that includes a plurality of solid features disposed therein. The plurality of solid features define a plurality of regions therebetween. A lubricant is disposed in the plurality of regions which retain the liquid lubricant in the plurality of regions during operation of the device. An electroactive phase comes in contact with at least the portion of the interior surface. The liquid lubricant impregnated surface introduces a slip at the surface when the electroactive phase flows along the surface. The electroactive phase may be a yield stress fluid.

公开(公告)号：US20180190973A1

公开(公告)日：2018-07-05

申请号：US15905017

申请日：2018-02-26

Applicant: Massachusetts Institute of Technology

Inventor： Xinwei Chen ,  Jiayan Luo ,  Yet-Ming Chiang

IPC: H01M4/1397 ,  H01M4/136 ,  H01M4/04 ,  H01M4/38 ,  H01M4/62 ,  H01M10/052

CPC classification number: H01M4/1397 ,  H01M4/0483 ,  H01M4/136 ,  H01M4/38 ,  H01M4/625 ,  H01M10/052 ,  H01M2300/0028 ,  H01M2300/0065 ,  H01M2300/0068

Abstract: Embodiments described herein relate generally to lithium sulfur batteries and methods of producing the same. As described herein, preventing coarsening of sulfur during the well-known melt-diffusion processing of cathodes allows a high areal capacity of 10.7 mAh/cm2 at current density of 3.4 mA/cm2 (C-rate of 1/5 h−1). The addition of a lithium salt, such as LiTFSI, prior to melt-diffusion can prevent coarsening of molten sulfur and allows creation of a sulfur electrode with a high concentration of triple-phase junctions for electrochemical reaction. In some embodiments, approximately 60-70% utilization of the theoretical capacity of sulfur is reached at a high loading (e.g., greater than 7.5 mg S/cm2). The electrodes are prepared in lean-electrolyte environment of 3 mlelectrolyte/gsulfur (˜70 vol % of electrolyte in the electrode) for high areal capacity in Li—S batteries.

公开(公告)号：US20150372350A1

公开(公告)日：2015-12-24

申请号：US14744792

申请日：2015-06-19

Applicant: Massachusetts Institute of Technology

Inventor： Brian Richmond Solomon ,  Xinwei Chen ,  Yet-Ming Chiang ,  Kripa K. Varanasi

IPC: H01M10/0569 ,  H01M8/02 ,  H01G9/145 ,  H01M4/62 ,  H01G9/048 ,  H01G9/035 ,  H01M8/04 ,  H01M10/02

CPC classification number: H01G9/145 ,  C09D5/037 ,  H01G9/035 ,  H01G9/048 ,  H01G11/06 ,  H01G11/26 ,  H01G11/38 ,  H01G11/64 ,  H01M8/02 ,  H01M8/12 ,  H01M8/188 ,  H01M10/02 ,  H01M10/052 ,  H01M10/36 ,  H01M12/06

Abstract: In certain embodiments, the invention relates to an electrochemical device having a liquid lubricant impregnated surface. At least a portion of the interior surface of the electrochemical device includes a portion that includes a plurality of solid features disposed therein. The plurality of solid features define a plurality of regions therebetween. A lubricant is disposed in the plurality of regions which retain the liquid lubricant in the plurality of regions during operation of the device. An electroactive phase comes in contact with at least the portion of the interior surface. The liquid lubricant impregnated surface introduces a slip at the surface when the electroactive phase flows along the surface. The electroactive phase may be a yield stress fluid.

Abstract translation: 在某些实施方案中，本发明涉及具有液体润滑剂浸渍表面的电化学装置。 电化学装置的内表面的至少一部分包括其中设置有多个固体特征的部分。 多个固体特征限定了它们之间的多个区域。 润滑剂设置在多个区域中，该区域在装置的操作期间将液体润滑剂保持在多个区域中。 电活性相与内表面的至少一部分接触。 当电活性相沿表面流动时，液体润滑剂浸渍的表面在表面引入滑移。 电活性相可以是屈服应力流体。

公开(公告)号：US10230124B2

公开(公告)日：2019-03-12

申请号：US14557924

申请日：2014-12-02

Applicant: Massachusetts Institute of Technology

Inventor： Brandon James Hopkins ,  Alexander H. Slocum ,  Xinwei Chen ,  Yet-Ming Chiang ,  Frank Yongzhen Fan ,  Ahmed Helal ,  Zheng Li ,  Kyle C. Smith ,  W. Craig Carter

IPC: H01M8/18 ,  H01M8/20 ,  H01M8/04276

Abstract: The flow cell includes first and second reservoirs having a selected volume containing a flowable redox electrode. A membrane separates charged and discharged material. An energy-extraction region includes electronically conductive porous current collectors through or adjacent to which the flowable redox electrodes flow and to which charge transfer occurs. Structure is provided for altering orientation of the flow cell whereby gravity induces flow of the flowable redox electrode between the first and second reservoirs to deliver power. By varying the angle of the cell, flow rate and power delivered on discharge or the charge rate on charge may be varied.

公开(公告)号：US09947481B2

公开(公告)日：2018-04-17

申请号：US14744792

申请日：2015-06-19

Applicant: Massachusetts Institute of Technology

Inventor： Brian Richmond Solomon ,  Xinwei Chen ,  Yet-Ming Chiang ,  Kripa K. Varanasi

IPC: H01G9/145 ,  H01G9/035 ,  H01G9/048 ,  H01M12/06 ,  H01M10/052 ,  H01M10/36 ,  H01M8/12 ,  H01M8/18 ,  H01M10/02 ,  H01M8/02 ,  C09D5/03

CPC classification number: H01G9/145 ,  C09D5/037 ,  H01G9/035 ,  H01G9/048 ,  H01G11/06 ,  H01G11/26 ,  H01G11/38 ,  H01G11/64 ,  H01M8/02 ,  H01M8/12 ,  H01M8/188 ,  H01M10/02 ,  H01M10/052 ,  H01M10/36 ,  H01M12/06

Abstract: In certain embodiments, the invention relates to an electrochemical device having a liquid lubricant impregnated surface. At least a portion of the interior surface of the electrochemical device includes a portion that includes a plurality of solid features disposed therein. The plurality of solid features define a plurality of regions therebetween. A lubricant is disposed in the plurality of regions which retain the liquid lubricant in the plurality of regions during operation of the device. An electroactive phase comes in contact with at least the portion of the interior surface. The liquid lubricant impregnated surface introduces a slip at the surface when the electroactive phase flows along the surface. The electroactive phase may be a yield stress fluid.