Natron Energy, Inc.

Monolith Materials, Inc.

Daniel Friebel

Grace Marjorie Yee

Peter Benjamin Herman

Colin Deane Wessells

Majid Keshavarz

Alex J Klevay

Ronald James Mosso

Keith Michael Wampler

Ali Firouzi

Dyuman Lionnel Das

Ashenafi Damtew Mamuye

Aniruddh Shrivastava

Axel Eugene Jean Guyon

Ned J Hardman

Xiongfei Shen

Vanessa Garcia

Heather Dawn Deshazer

Embodiments describe a scalable method for synthesizing Prussian White transition metal cyanide coordination compounds (TMCCC) of the general formula NaFe[Fe(CN)]n HO for use in battery electrodes. This method involves the controlled decomposition of sodium hexacyanoferrate decahydrate using formic acid, where particle size distribution is precisely controlled by modulating nucleation and growth. The process also includes a sodiation step using an aqueous buffer and a reducing agent. The synthesized materials exhibit high capacity and enable the commercialization of sodium-ion batteries, with the added benefit of byproduct processing. The method ensures precise regulation of particle size and morphology, leading to structural uniformity, and allows for tailoring tap density to optimize volumetric energy density. The resulting TMCCC demonstrates zero to low vacancy content and has a confirmed monoclinic phase.

Method for size-controlled synthesis of transition metal cyanide coordination compound

A system and method implementing and manufacturing transition metal cyanide coordination compounds (TMCCC) comprising Na, Fe, Mn, C, H, N, S, and O, wherein the TMCCC have 0-14% hexacyanometallate vacancies such as for application in electrochemical cells, including sodium ion secondary batteries.

Low vacancy Fe-substituted Mn-based prussian blue analogue

A system and method for a liquid electrolyte used in secondary electrochemical cells having at least one electrode including a TMCCC material, the liquid electrolyte enabling an increased lifetime while allowing for fast discharge to extremely high depth of discharge. The addition of dinitriles to liquid electrolytes in electrochemical cells in which energy storage is achieved by ion intercalation in transition metal cyanide coordination compounds (TMCCC) has the advantage of increasing device lifetime by inhibiting common chemical and electrochemical degradation mechanisms.

Electrochemical cell with TMCCC electrodes in an acetonitrile solvent including a dinitrile additive

A system and method implementing and manufacturing transition metal cyanide coordination compounds (TMCCC) comprising Na, Fe, Mn, C, H, N, S, and O, wherein the TMCCC have 0-14% hexacyanometallate vacancies such as for application in electrochemical cells, including sodium ion secondary batteries; further including both sodium and potassium with and without sulfate.

A system and method for implementing and manufacturing a hierarchy system for use with a TMCCC-containing electrically-conductive structure (e.g., an electrode) as well as methods for use and manufacturing of such structures and electrochemical cells including these devices. Structures and methods include a coordination complex having LMNTiVCrMnFeCoNiCuZnCaMg[R(CN)](HO). The method includes binding electrochemically active material to produce a hierarchical structure, the hierarchical structure having a plurality of primary crystallites having a size D1, the plurality of these primary crystallites agglomerated into a set of agglomerates each agglomerate having a size D2>D1.

Hierachical structure of transition metal cyanide coordination compounds

An electrochemical cell having one or more electrodes with TMCCC materials introduces improved performance by including a special separator having ceramics and/or a discrete multilayer construction. TMCCC materials with no surface modifications, and existing electrolytes with no composition modifications are combined with a different grade of separator to improve cell performance.

Separator for electrochemical cell

A system and method for optimizing electrochemical cells including electrodes employing coordination compounds by mediating water content within a desired water content profile that includes sufficient coordinated water and reduces non-coordinated water below a desired target and with electrochemical cells including a coordination compound electrochemically active in one or more electrodes, with an improvement in electrochemical cell manufacture that relaxes standards for water content of electrochemical cells having one or more electrodes including one or more such transition metal cyanide coordination compounds.

Optimization of electrochemical cell

Low vacancy Fe-substituted Mn-based Prussian blue analogue

A system and method for implementing and manufacturing a hierarchy system for use with a TMCCC-containing electrically-conductive structure (e.g., an electrode) as well as methods for use and manufacturing of such structures and electrochemical cells including these devices. Structures and methods include a coordination complex having LMNTiVCrMnFeCoNiCuZnCaMg[R(CN)](HO). The method includes binding electrochemically active material to produce a hierarchical structure, the hierarchical structure having a plurality of primary crystallites having a size D1, the plurality of these primary crystallites agglomerated into a set of agglomerates each agglomerate having a size D2&#x3e;D1.

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San Carlos, CA, United States of America

Daniel Friebel