Gm Global Technolgoy Operations, Inc.

Qili Su

Haijing Liu

Zhe Li

Mengyan Hou

Meiyuan Wu

Xiaochao Que

Dewen Kong

Yong Qing Lu

Yong Lu

Mark William Verbrugge

Si Ruo Chen

Lyall Kenneth Winger

Dave G Rich

Jingjing Wu

Jingyuan Liu

Yiming Sun

Lianqi Zhang

A method for forming a bipolar solid-state battery may include preparing a plurality of freestanding gels each comprising a polymer, a solvent, and a lithium salt and, also, positioning a first freestanding gel between a first electrode and a second electrode and a second freestanding gel between the second electrode and a third electrode. Each of the first electrode, the second electrode, and the third electrode may include a plurality of electroactive particles. The method may also include infiltrating at least a portion of the first free-standing gel into a space between particles of the first electrode and the second electrode and at least a portion of the second free-standing gel into a space between the particles of second electrode and the third electrode.

Bipolar solid-state battery with enhanced interfacial contact

The present disclosure provides a positive electroactive material for an electrochemical cell that cycles lithium ions. The positive electroactive material includes a nickel-rich material including a plurality of solid-state particles. Each solid-state particle has a heterogeneous structure that includes a core and a shell that at least partially coats the core. The core includes a nickel-cobalt-manganese material, and the shell includes a nickel-cobalt-aluminum material. When the nickel-rich material is represented by LiNiCoMnAlO, the nickel-cobalt-manganese material is represented by LiNiCoMnO, and the nickel-cobalt-aluminum material is represented by LiNiCoAlO, where (i) 1-x-y-z>0.5, (ii) a+b=1, (iii) zx″+bx″=x, and (iv) 1-x″-(y/a)>1-x″-(z/b). In certain variations, the core and the shell define a base structure, and the heterogeneous structure further includes a buffer layer that at least partially coats the base structure.

Positive electroactive materials for all-solid-state battery

In various aspects, the present disclosure provides solvent-free methods of making a solid-state electrode active layer for a solid-state electrode in an electrochemical cell that cycles lithium ions, by using a plurality of solid polymeric binder particles capable of fibrillation with porous fibrillation particles with a first shear force to at least partially fibrillate the solid polymeric binder particles to form a polymeric binder mixture. The disclosure also contemplates a current collector and a porous active layer disposed thereon. The porous active layer includes a fibrous polymeric network having a plurality of solid particles distributed therein. The solid particles may include electroactive material particles, solid-state electrolyte particles, and porous fibrillation particles.

Solvent-free methods of forming solid-state electrodes having polymeric fiber networks by using fibrillation processing additives and solid-state electrodes made therefrom

A battery system comprises N folded bipolar batteries folded in an 'S'-shaped configuration. First and second folded portions of each of the N folded bipolar batteries are arranged on opposite ends of the “S”-shaped configuration. First side portions and second side portions of each of the N folded bipolar batteries are arranged between the first and second folded portions. One or more of the first folded portions on a first one of the N folded bipolar batteries are in direct electrical contact with one or more of the second folded portions on a second one of the N folded bipolar batteries. One or more of the first side portions on a third one of the N folded bipolar batteries are in direct electrical contact with one or more of the second side portions on a fourth one of the N folded bipolar batteries.

High voltage battery including tab-free and weld-free folded bipolar solid-state batteries

A capacitor assisted battery module includes a first diode including an anode and a cathode. A second diode includes an anode and a cathode. The anode of the first diode is connected to the cathode of the second diode at a first node. A first capacitor assisted battery (CAB) block includes a positive terminal, a negative terminal and N CABs, where N is an integer greater than zero. The positive terminal of the first CAB block is connected to the cathode of the first diode. A second capacitor assisted battery (CAB) block includes a positive terminal, a negative terminal and N CABs, wherein the negative terminal of the second CAB block is connected to the anode of the second diode. The negative terminal of the first CAB block and the positive terminal of the second CAB block are connected to a second node.

Battery system including alternating current, fast-chargeable capacitor assisted batteries

A high-power gel-assisted battery stack that cycles lithium ions is provided with two terminal electrodes having opposite polarities and at least one bipolar electrode assembly disposed therebetween. A first electrode is disposed on a first side of a bipolar current collector and a second electrode with an opposite polarity to the first electrode is disposed on a second side of the bipolar current collector. Each electrode includes a porous layer having an electroactive material and a solid-state electrolyte disposed in a polymeric binder. A polymer gel electrolyte is distributed in pores of the porous. The stack also includes at least two free-standing gel separator layers each being disposed between the at least one bipolar electrode assembly and terminal electrodes. Each respective free-standing gel separator layer comprises polyacrylonitrile (PAN) and an electrolyte distributed therein. The high-power gel-assisted battery stack has a maximum voltage rating of ≥about 12V.

Designs of high-power gel-assisted bipolar solid-state battery

A method for forming a solid-state battery includes stacking two or more cell units, where each cell unit is formed by substantially aligning a first electrode and a second electrode, the first electrode including one or more first electroactive material layers disposed on or adjacent to one or more surfaces of a releasable substrate and the second electrode including one or more second electroactive material layers disposed on or adjacent to one or more surfaces of a current collector. The method may further include disposing an electrolyte layer between exposed surfaces of the first electrode and the second electrode and removing the releasable substrate to form the cell unit.

Methods of manufacturing bipolar solid-state batteries

An electrochemical cell that cycles lithium ions is provided. The electrochemical cell includes a first electrode, a second electrode, and an electrolyte layer disposed between the first electrode and the second electrode. The first electrode includes a first plurality of solid-state electroactive material particles and a first polymeric gel electrolyte, where the first polymeric gel electrolyte includes a first additive. The second electrode includes a second plurality of solid-state electroactive material particles and a second polymeric gel electrolyte that is different from the first polymeric gel electrolyte, where the second polymeric gel electrolyte includes a second additive. The electrolyte layers include a third polymeric gel electrolyte that is different from both the first polymeric gel electrolyte and the second polymeric gel electrolyte.

Gel electrolyte system for solid state battery

A negative electrode for an electrochemical cell that cycles lithium ions includes a particulate component embedded in a polymeric matrix component that comprises polytetrafluoroethylene. The particulate component includes a plurality of composite particles, with each of the composite particles having a core and a selective barrier layer disposed on a surface of the core. The core of each of the composite particles includes an electroactive negative electrode material. The selective barrier layer of each of the composite particles is formulated to prevent or inhibit electrochemical reactions from occurring between lithium stored in the electroactive negative electrode material of the core and the polytetrafluoroethylene in the polymeric matrix component.

Composite negative electrode materials and electrochemical cells including the same

A hybrid electrochemical device including at least two electrically connected solid-state electrochemical cells is provided. Each electrochemical cell includes a first outer electrode having a first current collector and a first electroactive layer, a second outer electrode having a second current collector and a second electroactive layer, and one or more intervening electrodes disposed between the electroactive layers. At least one of the intervening electrodes includes one or more capacitor additives. The first outer electrode is electrically connected to at least one of the intervening electrodes in a first electrical configuration. The second outer electrode is electrically connected to at least one of the intervening electrodes in a second electrical configuration. The at least two electrochemical cells are electrically connected in a third electrical configuration. The first and second electrical configurations are the same and the third electrical configuration is distinct from the first and second electrical configurations.

Capacitor-assisted electrochemical devices having hybrid structures

A battery includes positive and negative current collectors and a plurality of bipolar electrodes arranged in a stack between the positive and negative current collectors. The positive and negative current collectors and the stack of the plurality of bipolar electrodes are folded in an S-shape.

Folded bipolar battery design

An anode-free solid-state battery includes a cathode layer having transient anode elements and a bare current collector devoid of non-transitory anode material and configured to accept thereon the transient anode elements. The battery also includes a solid-state electrolyte layer defining voids and arranged between the current collector and the cathode layer. The battery additionally includes a gel situated within the solid-state electrolyte and cathode layers, to permeate the electrolyte voids and form a gelled solid-state electrolyte layer, coat the cathode layer, and facilitate ionic conduction of the anode elements between the cathode layer, the solid-state electrolyte layer, and the current collector. Charging the battery diffuses the anode elements from the cathode layer, via the gelled solid-state electrolyte layer, onto the current collector. Discharging the battery returns the anode elements, via the gelled solid-state electrolyte layer, to the cathode layer. A particular method is used to fabricate the anode-free solid-state battery.

Anode-free solid-state battery and method of battery fabrication

Hybrid lithium-ion electrochemical cells include a first electrode having a first polarity and a first electroactive material that reversibly cycles lithium ions having a first maximum operational voltage and a second electrode having the first polarity with a second electroactive material having a second maximum operational voltage. A difference between the second and first maximum operational voltages defines a predetermined voltage difference. Also included are at least one third electrode including a third electroactive material that reversibly cycles lithium ions having a second polarity opposite to the first polarity, a separator, and electrolyte. A voltage modification component (e.g., diode) is in electrical communication with the first and the second electrodes. In a first operational state corresponding to charging, the at least one voltage modification component is configured to induce a voltage drop corresponding to the predetermined voltage difference providing high power density and high energy density hybrid lithium-ion electrochemical cells.

Voltage-modified hybrid electrochemical cell design

An electrode including micro-sized secondary particle (MSSP) with enhanced ionic conductivity for solid-state battery is provided. The MSSP comprises a cathode particle and a solid-state electrolyte. The cathode particle is at least partially coated by solid-state electrolyte. The lithium ion transport inside the micro-sized secondary particles is increased by the incorporation of solid-state electrolyte. The electrode can be prepared by casting the slurry comprising MSSP, another electrolyte, binders, and conductive additives on the current collector. The current collector is comprised of a conductive material. The current collector has a first side and a second side. The electrode active material layer is disposed on one of the first and second sides of the current collector.

Micro-sized secondary particles with enhanced ionic conductivity for solid-state electrode

A bipolar battery may comprise first, second, and third bipolar electrodes that are physically and electrically isolated from one another by intervening non-liquid electrolyte layers. Each of the bipolar electrodes may comprise a bipolar current collector including a first electroactive material layer connected to a first side thereof and a second electroactive material layer connected to a second side thereof. Each electroactive material layer may comprise at least one of: (i) a lithium ion battery positive electrode material, (ii) a lithium ion battery negative electrode material, and/or (iii) a capacitor electrode material. At least one of the electroactive material layers comprises a capacitor electrode material.

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Shanghai, China

Qili Su