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Nano-engineered coatings for anode active materials, cathode active materials, and solid-state electrolytes and methods of making batteries containing nano-engineered coatings

A cathode active material and solid electrolyte technology, applied in the field of electrochemical batteries, can solve the problems of infeasible all-solid-state secondary batteries, inability to manufacture solid-state batteries, and unrecoverable capacity loss, achieve high capacity, prevent side reactions, and eliminate resistance effect of growth

Active Publication Date: 2018-03-27
PNEUMATICOAT TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the capacity loss from these side reactions cannot be recovered when the battery is cycled
[0018] Third, bulk conversion of NMC to spinel also reduces capacity and voltage
Problems addressed by the present invention include: Electrolyte oxidation at high voltages (e.g., top of charge), which depletes the electrolyte (and thus Li ions), and produces HF, leading to transition metal dissolution
However, prior to the present invention, all-solid-state secondary batteries were not commercially viable due to their performance deficiencies, such as the low conductivity of SSE materials relative to liquid electrolytes and the lack of chemical stability of conventional electrode These materials cannot be processed in advanced secondary battery processing systems, and solid-state batteries cannot be fabricated outside of controlled environments devoid of moisture and oxygen

Method used

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  • Nano-engineered coatings for anode active materials, cathode active materials, and solid-state electrolytes and methods of making batteries containing nano-engineered coatings
  • Nano-engineered coatings for anode active materials, cathode active materials, and solid-state electrolytes and methods of making batteries containing nano-engineered coatings
  • Nano-engineered coatings for anode active materials, cathode active materials, and solid-state electrolytes and methods of making batteries containing nano-engineered coatings

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Experimental program
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Effect test

Embodiment 1

[0175] Embodiments of the present invention were prepared on NMC 811 using an alumina coating. The active material NMC 811 powder is processed by atomic layer deposition to deposit Al on the active material particles of NMC 811 2 o 3 coating. Atomic layer deposition is typically performed at temperatures ranging from room temperature to over 300°C and at deposition rates sufficient to ensure a satisfactory coating while providing good throughput. sufficient to deposit 10 nm Al on NMC active material particles 2 o 3 In coating conditions, NMC 811 powder was applied by ALD process. The coated particles are then used to form an active material slurry that is applied to a current collector to form an electrode. The electrodes were then fabricated into batteries and tested against the uncoated active material.

[0176] The full battery cycle life of the coating material is as Figure 7C 33% improvement under the indicated C / 3 cycle rate, in such as Figure 8A 38% improvemen...

Embodiment 2

[0179] Embodiments of the present invention were prepared using alumina coatings on NCA. The active material NCA powder is processed by atomic layer deposition to deposit Al on the active material particles of NCA 2 o 3coating. Atomic layer deposition is typically performed at temperatures ranging from room temperature to over 300°C and at deposition rates sufficient to ensure a satisfactory coating while providing good throughput. sufficient to deposit 10 nm of Al on NCA active material particles 2 o 3 Under the conditions of the coating, the NCA powder is coated by the ALD process. The coated particles are then used to form a slurry for the active material, which is applied to a current collector to form an electrode. The electrodes were then fabricated into batteries and tested against the uncoated active material.

[0180] Such as Figure 9A As shown, the full battery cycle life of the coating material is increased by 31% at a 1C cycle rate. Such as Figure 9C As ...

Embodiment 3

[0182] Embodiments of the present invention were prepared using titania coatings on NCA. The active material NCA powder is processed by atomic layer deposition, and TiO is deposited on the NCA active material particles 2 coating. Atomic layer deposition is typically performed at temperatures ranging from room temperature to over 300°C and at deposition rates sufficient to ensure a satisfactory coating while providing good throughput. sufficient to deposit 10 nm of TiO on NCA active material particles 2 Under the conditions of the coating, the NCA powder is coated by the ALD process. The coated particles are then used to form a slurry for the active material, which is applied to a current collector to form an electrode. The electrodes were then fabricated into batteries and tested against the uncoated active material.

[0183] Such as Figure 9A As shown, the full battery cycle life of the coating material is increased by 57% at a 1C cycle rate. Such as Figure 9C As sho...

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Abstract

The present disclosure relates to a nano-engineered coating for cathode active materials, anode active materials, and solid state electrolyte materials for reducing corrosion and enhancing cycle lifeof a battery, and processes for applying the disclosed coating. Also disclosed is a solid state battery including a solid electrolyte layer having a solid electrolyte particle coated by a protective coating with a thickness of 100 nm or less. The protective coating is obtained by atomic layer deposition (ALD) or molecular layer deposition (MLD). Further disclosed is a solid electrolyte layer for asolid state battery, including a porous scaffold coated by a first, solid electrolyte coating. The solid electrolyte coating has a thickness of 60 mu m or less and a weight loading of at least 20 wt.% (or preferable at least 40 wt.% or at least 50 wt.%). Further disclosed is a cathode composite layer for a solid state battery.

Description

[0001] Cross References to Related Applications [0002] This PCT application claims priority to and is a continuation-in-part of U.S. application 15 / 170,374, filed June 1, 2016, which claims priority and is a continuation-in-part of U.S. application 15 / 167,453, filed May 27, 2016, US application 15 / 167,453 claims priority to and is a continuation-in-part of US patent application 14 / 727,834, filed June 1, 2015. This application also claims priority to US Provisional Application 62 / 312,227, filed March 23, 2016. The entire content of each of the above applications is incorporated herein by reference. technical field [0003] Embodiments of the present invention relate generally to electrochemical cells. In particular, embodiments of the present invention relate to batteries having nanoengineered coatings on some of their constituent materials. More specifically, embodiments of the present invention relate to nanoengineered coatings for anode active materials, cathode active ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M6/18H01M6/22H01M10/052
CPCH01M4/366H01M10/052H01M10/0562H01M6/18H01M6/183H01M6/186H01M6/188H01M2300/0065H01M2300/0071H01M2300/008H01M2300/0082
Inventor 法比奥·阿尔巴诺凯文·达尔伯格埃里克·安德森苏巴什·达尔斯里尼瓦桑·文卡特桑詹姆斯·特里尔大卫·M·金保罗·R·利克蒂
Owner PNEUMATICOAT TECH LLC
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