Agar-derived nitrogen-doped porous carbon as anode for construction of cost-effective lithium-ion batteries |
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| Affiliation: | 1. Institute for New Energy Materials & Low Carbon Technologies, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China;2. School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu 273100, China;1. Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China;2. Department of Pharmaceutical Analysis, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China;3. Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Hepato-Pancreato-Biliary Surgery, Peking University Cancer Hospital & Institute, Beijing 100142, China;1. Institute of Environmental and Energy Catalysis, School of Materials Science and Chemical Engineering, Xi''an Technological University, Xi''an 710021, China;2. School of Sciences, Xi''an Technological University, Xi''an 710021, China;1. College of Pharmaceutical Sciences, Key Laboratory of Public Health Safety of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding 071002, China;2. College of Basic Medical Science, Key Laboratory for Proteomics of Liaoning Province, Dalian Medical University, Dalian 116044, China;1. School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;2. Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory of Function Materials for Molecule & Structure Construction, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;3. Institute of Advanced Materials, Beijing Normal University, Beijing 100875, China;4. Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education of China, Chongqing University, Chongqing 400044, China;5. Shunde Graduate School, University of Science and Technology Beijing, Shunde 528399, China;1. CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China;2. College of Chemistry, Zhengzhou University, Zhengzhou 450001, China |
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| Abstract: | Balancing cost and performance of porous carbon (PC) as anode for lithium-ion battery (LIBs) is the key to effectively promote commercial application. Herein, low-cost N-doped PC (NPC-Ts, T = 600, 750 and 900 °C) were facilely prepared in batches via one-pot pyrolysis of agar with different carbonization temperature. The NPC-750 with specific surface area of 2914 m2/g and N content of 2.84% exhibits an ultrahigh reversible capacity of 1019 mAh/g at 0.1 A/g after 100 cycles and 837 mAh/g at 1 A/g after 500 cycles. Remarkably, the resulting LIBs exhibit an ultrafast charge-discharge feature with a remarkable capacity of 281 mAh/g at 10 A/g and a superlong cycle life with a capacity retention of 87% after 5000 cycles at 10 A/g. Coupling with LiFePO4 cathode, the fabricated lithium-ion full cells possess high capacity, excellent rate and cycling performances (125 mAh/g at 100 mA/g, capacity retention of 95%, after 220 cycles), highlighting the practicability of this NPC-750 as the anode materials. |
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