Enhanced Lithium Storage in Hierarchically Porous Carbon Derived from Waste Tea Leaves

被引：39

作者：

Choi, Changhoon ^{[1
]}

Seo, Seung-Deok ^{[1
]}

Kim, Byung-Kook ^{[2
]}

Kim, Dong-Wan ^{[1
]}

机构：

[1] Korea Univ, Sch Civil Environm & Architectural Engn, Seoul 136713, South Korea

[2] Korea Inst Sci & Technol, High Temp Energy Mat Res Ctr, Seoul 136791, South Korea

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

新加坡国家研究基金会;

关键词：

TEMPLATE-FREE SYNTHESIS; ANODE MATERIALS; HIGH-PERFORMANCE; MACROPOROUS CARBON; ION BATTERIES; RICE HUSK; LOW-COST; BIOMASS; ENERGY; CAPACITY;

D O I：

10.1038/srep39099

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In this study, highly nanoporous carbon (HCl-TW-Car) was successfully synthesized using a facile procedure combining acid treatment with a carbonization process that uses waste tea leaves from spent tea bags as raw materials. The acid treatment not only promotes the efficient removal of unnecessary inorganic impurities but also increases the product porosity to enable synthesis of hierarchically porous carbon materials with various micro-, meso-, and macropores. When used as an anode material for lithium-ion batteries, HCl-TW-Car demonstrated a much higher discharge capacity than is theoretically possible using graphite [479 mAh g(-1) after the 200th cycle at a rate of 0.2C (1C = 372 mA g(-1))] and exhibited greater rate capabilities compared with those of carbonated products from tea waste without acid treatment. It was shown that the good electrochemical properties of HCl-TW-Car can be ascribed to large Brunauer-Emmett-Teller (BET) surface area, well-formed hierarchical pores, and the prevention of unexpected electrochemical reactions from the reduction of metallic atoms.

引用

页数：10

共 53 条

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