Effects of Phosphorous-doping on Electrochemical Performance and Surface Chemistry of Soft Carbon Electrodes

被引：13

作者：

Kim, Min-Jeong ^{[1
]}

Yeon, Jin-Tak ^{[2
]}

Hong, Kijoo ^{[3
]}

Lee, Sang-Ick ^{[3
]}

Choi, Nam-Soon ^{[2
]}

Kim, Sung-Soo ^{[1
]}

机构：

[1] Chungnam Natl Univ, Grad Sch Green Energy Technol, Taejon 305764, South Korea

[2] UNIST, Interdisciplinary Sch Green Energy, Ulsan 689798, South Korea

[3] CRD Ctr, GS Energy, Taejon 305380, South Korea

来源：

BULLETIN OF THE KOREAN CHEMICAL SOCIETY | 2013年 / 34卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

Soft carbon; Phosphorous doping; Solid electrolyte interphase; Electrolyte; Thermal reactions; LITHIUM-ION BATTERIES; DISORDERED CARBON; GRAPHITE ANODE; VINYLENE CARBONATE; THERMAL-STABILITY; ACTIVATED CARBONS; FILM FORMATION; LI-ION; INTERCALATION; MICROSCOPY;

D O I：

10.5012/bkcs.2013.34.7.2029

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The impact of phosphorous (P)-doping on the electrochemical performance and surface chemistry of soft carbon is investigated by means of galvanostatic cycling and ex situ X-ray photoelectron spectroscopy (XPS). P-doping plays an important role in storing more Li ions and discernibly improves reversible capacity. However, the discharge capacity retention of P-doped soft carbon electrodes deteriorated at 60 degrees C compared to non-doped soft carbon. This poor capacity retention could be improved by vinylene carbonate (VC) participating in forming a protective interfacial chemistry on soft carbon. In addition, the effect of P-doping on exothermic thermal reactions of lithiated soft carbon with electrolyte solution is discussed on the basis of differential scanning calorimetry (DSC) results.

引用

页码：2029 / 2035

页数：7

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