Improving the Energy Density of Potassium-Ion Batteries Through Defect Engineering

被引:0
作者
Wang, Chen [1 ]
Cai, Hongtu [1 ]
Zheng, Shumin [2 ,3 ]
Wang, Bao [2 ,3 ]
Wang, Shaoyan [1 ]
机构
[1] Univ Sci & Technol Liaoning, Sch Chem Engn, 189 Qianshan Middle Rd, Anshan 114051, Liaoning, Peoples R China
[2] Chinese Acad Sci, State Key Lab Biochem Engn, Inst Proc Engn, Beijing 100190, Peoples R China
[3] Chinese Acad Sci, Key Lab Biopharmaceut Preparat & Delivery, Beijing 100190, Peoples R China
关键词
Anode; Co-doping; Potassium-ion batteries; Toluene insoluble; LITHIUM-ION; CARBONACEOUS MATERIALS; ANODE MATERIALS; ELECTRODE; NITROGEN; SODIUM;
D O I
10.1002/slct.202404105
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Potassium-ion batteries (PIBs) have a significant cost advantage in resources, making their commercial application imminent. Presently, the cycling lifespan and energy density of PIBs lag behind those of lithium-ion batteries, highlighting the crucial need for anode materials suitable for potassium storage. This paper used high-pressure heat treatment and extraction methods to obtained toluene insoluble (TI) as a carbon matrix, followed by nickel and nitrogen co-doping to synthesized anode materials (NiNTI). NiNTI is characterized by defect engineering such as thermal condensation polymerization and template doping, which destroys the flattening of the material, provides more active sites, forms more disordered carbon structures, generates a large number of defects and structural vacancies, and improves the electronic conductivity of NiNTI materials. In the NiNTI half-cell configuration, operating at a current density of 0.1 A g-1, the reversible specific capacity reaches 364 mAh g-1, with an initial coulombic efficiency of 64.9%.
引用
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页数:9
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