Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 9, Issue 10, Pages 6131-6138Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta12127d
Keywords
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Funding
- National Natural Science Foundation of China [21905205]
- Natural Science Foundation of Tianjin City [19JCQNJC05900, 20JCZDJC00280]
- National Key RAMP
- D Program of China [2017YFA0700104]
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A highly pyridine- and pyrrole-N-doped carbon cloth (NCC) was reported as a promising host for anchoring Benzoquinone (BQ) and its discharge products, resulting in a cathode with high initial capacity and long cycle life for aqueous Zn-ion batteries. This novel strategy provides potential practical applications for constructing high-performance batteries.
Benzoquinone (BQ) is a desirable cathode for aqueous rechargeable batteries because of its high theoretical capacity and low cost. However, its application is seriously hindered by the high solubility of its discharge product in electrolytes, leading to rapid capacity decay. Here, we report a highly pyridine- and pyrrole-N-doped carbon cloth (NCC) with hierarchical pores as a promising host to anchor BQ and its discharge products. The resultant cathode (BQ-NCC) exhibits an ultrahigh initial capacity of 489 mA h g(BQ)(-1) (excluding the capacity contribution of NCC) at 0.1 A g(-1) and a long cycle life with a high capacity retention of 90.4% at 0.5 A g(-1) after 500 cycles. Furthermore, a pouch-type cell with a capacity of similar to 0.23 A h delivers an energy density of 136.1 W h kg(-1) based on the total mass of BQ-NCC and Zn foil. Our study provides a novel strategy to construct high-performance aqueous Zn-ion batteries for potential practical applications.
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