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11. In situ deprotection of polymeric binders for solution‐processible sulfide‐based all‐solid‐state batteries

Author

Lee, Jieun, Lee, Kyulin, Lee, Taegeun, Kim, Hyuntae, Kim, Kyungsu, Cho, Woosuk, Coskun, Ali, Char, Kookheon, Choi, Jang Wook, Lee, Jieun, Lee, Kyulin, Lee, Taegeun, Kim, Hyuntae, Kim, Kyungsu, Cho, Woosuk, Coskun, Ali, Char, Kookheon, and Choi, Jang Wook

Abstract

Sulfide‐based all‐solid‐state batteries (ASSBs) have been featured as promising alternatives to the current lithium‐ion batteries (LIBs) mainly owing to their superior safety. Nevertheless, a solution‐based scalable manufacturing scheme has not yet been established because of the incompatible polarity of the binder, solvent, and sulfide electrolyte during slurry preparation. This dilemma is overcome by subjecting the acrylate (co)polymeric binders to protection−deprotection chemistry. Protection by the tert‐butyl group allows for homogeneous dispersion of the binder in the slurry based on a relatively less polar solvent, with subsequent heat‐treatment during the drying process to cleave the tert‐butyl group. This exposes the polar carboxylic acid groups, which are then able to engage in hydrogen bonding with the active cathode material, high‐nickel layered oxide. Deprotection strengthens the electrode adhesion such that the strength equals that of commercial LIB electrodes, and the key electrochemical performance parameters are improved markedly in both half‐cell and full‐cell settings. The present study highlights the potential of sulfide‐based ASSBs for scalable manufacturing and also provides insights that protection−deprotection chemistry can generally be used for various battery cells that suffer from polarity incompatibility among multiple electrode components.

Published
2020

12. Performance evaluation of an amplicon‐based next‐generation sequencing panel for BRCA1 and BRCA2 variant detection

Author

Park, Kuenyoul, primary, Kim, Min Kyu, additional, Lee, Taegeun, additional, Hong, Jinyoung, additional, Kim, Hyun‐Ki, additional, Ahn, Sunyoung, additional, Lee, Young‐Jae, additional, Kim, Jisun, additional, Lee, Shin‐Wha, additional, Lee, Jong Won, additional, Lee, Woochang, additional, Chun, Sail, additional, Son, Byung Ho, additional, Jung, Kyung Hae, additional, Kim, Yong‐Man, additional, Min, Won‐Ki, additional, and Ahn, Sei‐Hyun, additional

Published
2020
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16. Risk management strategy for reducing therapeutic plasma exchange‐related allergic reactions.

Author

Lee, Taegeun, Yang, John Jeongseok, Kim, Sihwan, Lee, Hye‐jin, Ko, Dae‐Hyun, Hwang, Sang‐Hyun, Kwon, Hyouk‐Soo, and Oh, Heung‐Bum

Subjects
*ALLERGIES, *RISK management in business, *PANCREAS transplantation, *ATOPY, *THROMBOTIC thrombocytopenic purpura
Abstract

To the Editor, Therapeutic plasma exchange (TPE) is a procedure for removing antibodies and toxic metabolites from the plasma.[1] Although TPE is generally regarded as a safe procedure, TPE-related allergic reactions (ARs) occur commonly, at a frequency of 1.4%-12.0%.[[2]] TPE-related ARs vary from mild discomfort to severe and lethal events such as anaphylaxis.[[1]] Nevertheless, the need for a TPE-related AR prophylaxis has not been well studied, and pretreatments for preventing these complications are not routinely recommended.[4] In this study, we aimed to identify the risk factors for TPE-related ARs and to determine whether pretreatments targeting these risk factors could reduce the incidence of these adverse events. This was based on previous evidence that TPE-related ARs occur more frequently when FFP, rather than albumin, is used as the replacement fluid.[2] Risk factor analysis for TPE-related ARs was conducted using logistic regression. Because the allergy history of the patient was a newly identified risk factor, pretreatment for AR prevention was initiated at our hospital from May 1, 2017, for any TPE patients with a history of allergy or in whom FFP was used as the replacement fluid (Figure S1). In conclusion, selective pretreatment of patients undergoing TPE after the identification of risk factors for TPE-related ARs is effective in reducing these complications, in contrast to previous beliefs that pretreatment is unnecessary. [Extracted from the article]

Published
2020
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25. In situ deprotection of polymeric binders for solution‐processible sulfide‐based all‐solid‐state batteries

Author

Lee, Jieun, Lee, Kyulin, Lee, Taegeun, Kim, Hyuntae, Kim, Kyungsu, Cho, Woosuk, Coskun, Ali, Char, Kookheon, Choi, Jang Wook, Lee, Jieun, Lee, Kyulin, Lee, Taegeun, Kim, Hyuntae, Kim, Kyungsu, Cho, Woosuk, Coskun, Ali, Char, Kookheon, and Choi, Jang Wook

Abstract

Sulfide‐based all‐solid‐state batteries (ASSBs) have been featured as promising alternatives to the current lithium‐ion batteries (LIBs) mainly owing to their superior safety. Nevertheless, a solution‐based scalable manufacturing scheme has not yet been established because of the incompatible polarity of the binder, solvent, and sulfide electrolyte during slurry preparation. This dilemma is overcome by subjecting the acrylate (co)polymeric binders to protection−deprotection chemistry. Protection by the tert‐butyl group allows for homogeneous dispersion of the binder in the slurry based on a relatively less polar solvent, with subsequent heat‐treatment during the drying process to cleave the tert‐butyl group. This exposes the polar carboxylic acid groups, which are then able to engage in hydrogen bonding with the active cathode material, high‐nickel layered oxide. Deprotection strengthens the electrode adhesion such that the strength equals that of commercial LIB electrodes, and the key electrochemical performance parameters are improved markedly in both half‐cell and full‐cell settings. The present study highlights the potential of sulfide‐based ASSBs for scalable manufacturing and also provides insights that protection−deprotection chemistry can generally be used for various battery cells that suffer from polarity incompatibility among multiple electrode components.

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