New research directions in disordered carbon anodes for Na-ion batteries

Na-ion batteries (NIBs) are gradually attracting overmuch attraction arsenic an alternate to lead-acid batteries and supplement to Li-ion batteries (LIBs) owing to the abundant Na resources and fantabulous cost-effectiveness. Since the astir commonly utilized graphite arsenic an anode worldly successful LIBs cannot beryllium inherently utilized successful NIBs, tremendous efforts person been made to beforehand the cardinal knowing and plan of suitable anode materials for NIBs, including the betterment of Na retention capableness and the survey connected Na retention mechanisms. According to each these studies, disordered carbons are present the astir promising anode candidates for NIBs. Nevertheless, determination are inactive galore challenges request to beryllium addressed, and the further exploration of disordered c anodes is precise important successful the future.

Recently, Prof. Yong-Sheng Hu and Prof. Yaxiang Lu from Institute of Physics, Chinese Academy of Sciences systematically reviewed and projected the aboriginal probe directions of disordered c anodes for NIBs and discussed the existent advancement and remaining challenges.

The authors archetypal summarized the milestones of the studies connected disordered carbons for Na retention during the past decades, portion determination are inactive galore challenges and unsolved questions. The authors projected 5 main probe directions connected disordered c anode materials:

1. Understanding the existent controversies and depicting a implicit representation of Na retention mechanisms successful disordered carbons;
2. Developing hard c anode materials with ultrahigh Na retention capableness implicit 400 mAh/g;
3. Developing "sloping-type" carbons towards high-power and harmless NIBs;
4. Modification of brushed carbons for precocious outgo effectiveness;
5. Understanding the coagulated electrolyte interphase and improving the archetypal Coulombic efficiency.

The existent probe advancement for each absorption was summarized, and the remaining challenges were discussed. The authors besides supply imaginable solutions for each direction. Early researches person good laid the instauration of the survey of disordered c anodes for NIBs and paved the roadworthy from laboratory to commercialization. The authors judge that further probe is needed to lick the remaining questions and breaking the bottlenecks of the disordered carbon anodes volition enactment NIBs a large forward.

The reappraisal nonfiction has been published connected Science China Chemistry.

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More information: Fei Xie et al, Disordered c anodes for Na-ion batteries—quo vadis?, Science China Chemistry (2021). DOI: 10.1007/s11426-021-1074-8