Influence of Carbon Coating on Beta‐Alumina Membrane for Sodium–Nickel Chloride Battery

Kim, Seonmin; Lee, Sang‐Min; Jung, Kyu Yong; Park, Yoon-Cheol; Cho, Namung; Choi, Joon‐Hwan; Kim, Hyunsoo

doi:10.1002/bkcs.10584

Cited by 13 publications

(8 citation statements)

References 13 publications

(19 reference statements)

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“…Ceramic SEs such as β″-Al 2 O 3 and NASICON-type oxides exhibit excellent chemical stability towards Na metal. Nevertheless, their high Na-ion conductivities are achieved only when they are processed to near theoretical densities, requiring sintering temperatures in excess of 1500 o C for long hours, and are subjected to poor wettability with Na metal due to their rigid and rough surface 8 , 9 . Furthermore, it has been observed that Na metal preferentially propagates along distinct grain boundaries, forming dendrites that eventually short circuit the electrolyte 10 , 11 (Fig.…”

Section: Introductionmentioning

confidence: 99%

An electrochemically stable homogeneous glassy electrolyte formed at room temperature for all-solid-state sodium batteries

et al. 2022

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All-solid-state sodium batteries (ASSSBs) are promising candidates for grid-scale energy storage. However, there are no commercialized ASSSBs yet, in part due to the lack of a low-cost, simple-to-fabricate solid electrolyte (SE) with electrochemical stability towards Na metal. In this work, we report a family of oxysulfide glass SEs (Na3PS4−xOx, where 0 < x ≤ 0.60) that not only exhibit the highest critical current density among all Na-ion conducting sulfide-based SEs, but also enable high-performance ambient-temperature sodium-sulfur batteries. By forming bridging oxygen units, the Na3PS4−xOx SEs undergo pressure-induced sintering at room temperature, resulting in a fully homogeneous glass structure with robust mechanical properties. Furthermore, the self-passivating solid electrolyte interphase at the Na|SE interface is critical for interface stabilization and reversible Na plating and stripping. The new structural and compositional design strategies presented here provide a new paradigm in the development of safe, low-cost, energy-dense, and long-lifetime ASSSBs.

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Section: Introductionmentioning

confidence: 99%

An electrochemically stable homogeneous glassy electrolyte formed at room temperature for all-solid-state sodium batteries

et al. 2022

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“…Early works on molten sodium–sulfur batteries between 300 and 350 °C showed that the edge interface on the BASE between the conducting (electrolyte area wetted by sodium) and the non-conducting area were susceptible to mechanical stress. The difference in pressure prompted pitting, electrolyte dissolution, or dendrite growth, which all contributed to the eventual cell failure. − To reduce the edge state on the BASE, uniform and intimate wetting over the entire BASE area became a standing goal for interface engineering in sodium batteries to increase cell longevity. , Likewise, for molten sodium batteries operating at intermediate temperatures (150 to 200 °C) and low temperatures (100 to 150 °C), good Na wettability is critical for successful battery operations including lower over potential, high capacity, long/stable cycle life, and so forth. − In addition to heat treatment that removes adverse surface absorbents such as moisture, , a variety of chemical modification has been applied to spread molten sodium evenly onto the BASE surface, including lead, ,, tin, − bismuth, platinum, iron oxide, and various carbon derivatives, ,− such as sparked reduced graphene oxide …”

Section: Introductionmentioning

confidence: 99%

Interfacial Engineering with a Nanoparticle-Decorated Porous Carbon Structure on β″-Alumina Solid-State Electrolytes for Molten Sodium Batteries

Tripathi

Polikarpov

et al. 2022

ACS Appl. Mater. Interfaces

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We present a novel anode interface modification on the β″-alumina solid-state electrolyte that improves the wetting behavior of molten sodium in battery applications. Heat treating a simple slurry, composed only of water, acetone, carbon black, and lead acetate, formed a porous carbon network decorated with PbO x (0 ≤ x ≤ 2) nanoparticles between 10 and 50 nm. Extensive performance analysis, through impedance spectroscopy and symmetric cycling, shows a stable, low-resistance interface for close to 6000 cycles. Furthermore, an intermediate temperature Na−S cell with a modified β″-alumina solid-state electrolyte could achieve an average stable cycling capacity as high as 509 mA h/g. This modification drastically decreases the amount of Pb content to approximately 3% in the anode interface (6 wt % or 0.4 mol %) and could further eliminate the need for toxic Pb altogether by replacing it with environmentally benign Sn. Overall, in situ reduction of oxide nanoparticles created a high-performance anode interface, further enabling large-scale applications of liquid metal anodes with solid-state electrolytes.

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“…The cathode current collector was made of a Ni rod, and the upper side of the cell was sealed with a Teflon cap to prevent contamination. The anode side of BASE tube was coated with carbon paste (Research Institute of Industrial Science and Technology (RIST), Pohang-si, Korea) to improve the wettability of Na melt to the BASE surface [ 20 ]. The BASE tube was heat-treated at 230 °C for 30 min after carbon coating to remove a polymer and water contained in the carbon paste.…”

Section: Methodsmentioning

confidence: 99%

Effect of Cathode Microstructure on Electrochemical Properties of Sodium Nickel-Iron Chloride Batteries

Ahn

Hahn

et al. 2021

Materials

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Sodium metal chloride batteries have become a substantial focus area in the research on prospective alternatives for battery energy storage systems (BESSs) since they are more stable than lithium ion batteries. This study demonstrates the effects of the cathode microstructure on the electrochemical properties of sodium metal chloride cells. The cathode powder is manufactured in the form of granules composed of a metal active material and NaCl, and the ionic conductivity is attained by filling the interiors of the granules with a second electrolyte (NaAlCl4). Thus, the microstructure of the cathode powder had to be optimized to ensure that the second electrolyte effectively penetrated the cathode granules. The microstructure was modified by selecting the NaCl size and density of the cathode granules, and the resulting Na/(Ni,Fe)Cl2 cell showed a high capacity of 224 mAh g−1 at the 100th cycle owing to microstructural improvements. These findings demonstrate that control of the cathode microstructure is essential when cathode powders are used to manufacture sodium metal chloride batteries.

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Influence of Carbon Coating on Beta‐Alumina Membrane for Sodium–Nickel Chloride Battery

Cited by 13 publications

References 13 publications

An electrochemically stable homogeneous glassy electrolyte formed at room temperature for all-solid-state sodium batteries

An electrochemically stable homogeneous glassy electrolyte formed at room temperature for all-solid-state sodium batteries

Interfacial Engineering with a Nanoparticle-Decorated Porous Carbon Structure on β″-Alumina Solid-State Electrolytes for Molten Sodium Batteries

Effect of Cathode Microstructure on Electrochemical Properties of Sodium Nickel-Iron Chloride Batteries

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