Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 14, Issue 7, Pages 8955-8962Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c21026
Keywords
zinc iodine batteries; nitrogen doping carbon materials; nanosized porous structure; multifunctional iodine host; highly efficient and stable
Funding
- Key R&D Program of China [2020YFA0710000]
- National Natural Science Foundation of China [22075075, 51402100, 21573066, 21825201, 21805080, U19A2017]
- Hunan Province of Huxiang Talent project [2021RC3051]
- Provincial Natural Science Foundation of Hunan [2021JJ40140]
- Research Foundation of Education Bureau of Hunan Province [21B0812]
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The use of multifunctional iodine host made of nitrogen-doped porous carbon nanocages improves the electrochemical performance and lifespan of the rechargeable zinc-iodine battery, achieving high specific capacity, good rate performance, and high cycle stability. This work presents a novel and efficient strategy to develop high-performance and long-life Zn-I-2 batteries.
The rechargeable zinc-iodine (Zn-I-2) battery is a promising energy-storage system due to its low cost and good security, but the practical use of the battery is largely constrained by the shuttle effect and high dissolvability of iodides. Here a multifunctional iodine host, constructed with nitrogen-doped porous carbon nanocages (NCCs) by the polymerization carbonization activation method, is exploited to improve the electrochemical performance and lifespan of the Zn-I-2 battery, achieving a high specific capacity of 259 mAh g(-1), a good rate performance (maintaining 50.6% expanding 50 times), and a high cycle stability (retention of 100% after 1000 cycles). On the basis of the experimental results and theoretical calculations, NCCs via the introduction of N doping and nanosized porous structure can simultaneously provide rich and robust anchoring and catalytic sites to carry out the electrostatic adsorption of iodides and facilitate the reversible conversion between iodine and iodides. This work shows a novel and efficient strategy to develop high-performance and long-life Zn-I-2 batteries.
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