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Abstract High‐energy‐density lithium metal batteries (LMBs) are widely accepted as promising next‐generation energy storage systems. However, the safety features of practical LMBs are rarely explored quantitatively. Herein, the thermal runaway behaviors of a 3.26 Ah (343 Wh kg−1) Li | LiNi0.5Co0.2Mn0.3O2 pouch cell in the whole life cycle are quantitatively investigated by extended volume‐accelerating rate calorimetry and differential scanning calorimetry. By thermal failure analyses on pristine cell with fresh Li metal, activated cell with once plated dendrites, and 20‐cycled cell with large quantities of dendrites and dead Li, dendrite‐accelerated thermal runaway mechanisms including reaction sequence and heat release contribution are reached. Suppressing dendrite growth and reducing the reactivity between Li metal anode and electrolyte at high temperature are effective strategies to enhance the safety performance of LMBs. These findings can largely enhance the understanding on the thermal runaway behaviors of Li metal pouch cells in practical working conditions.

Polysaccharides and polyphenols are important secondary metabolites from the medicinal mushroom Inonotus obliquus. The objectives of this work were to investigate the ability of I. obliquus under submerged fermentation for the peanut shell biomass degradation and for the simultaneous enhancement of production and antioxidant activity of polysaccharides and polyphenols. Approximate 66.2%, 67.6%, and 70.2% of the initial cellulose, hemicellulose, and lignin in the peanut shells were degraded after 12 days of fermentation. The lignocellulose degradation showed a stimulatory effect on mycelial yield, production and antioxidant activity of extra- and intra-cellular polysaccharides and polyphenols. Highly active polyphenols such as epigallocatechin-3-gallate, epicatechin-3-gallate, phelligridin G, davallialactone, and inoscavin B were generated in larger amounts and phenolic acids such as gallic acid and ferulic acid were decreased dramatically by the lignocellulose degradation. [ABSTRACT FROM AUTHOR]