TiO2(B) Nanoribbons As Negative Electrode Material for Lithium Ion Batteries with High Rate Performance

被引:111
作者
Beuvier, Thomas [1 ]
Richard-Plouet, Mireille [1 ]
Mancini-Le Granvalet, Maryline [1 ]
Brousse, Thierry [2 ]
Crosnier, Olivier [2 ]
Brohan, Luc [1 ]
机构
[1] Univ Nantes, Inst Mat Jean Rouxel IMN, CNRS, F-44322 Nantes, France
[2] Univ Nantes, Polytech Nantes, LGMPA, EA2664, F-44306 Nantes 3, France
关键词
TITANATE NANOTUBES; NANOWIRES; STORAGE; INTERCALATION; ANATASE; ELECTROCHEMISTRY; NANOSTRUCTURES; NANORODS;
D O I
10.1021/ic1010192
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Nanosized TiO2(B) has been investigated as a possible candidate to replace Li4Ti5O12 or graphite as the negative electrode for a Li-ion battery. Nanoribbon precursors, classically synthesized in autogenous conditions at temperatures higher than 170 degrees C in alkaline medium, have been obtained, under reflux (T similar to 120 degrees C, P = 1 bar). After ionic exchange, these nanoribbons exhibit a surface area of 140 m(2) g(-1), larger than those obtained under autogenous conditions or by solid state chemistry. These nanoparticles transform after annealing to isomorphic titanium dioxide. They mainly crystallize as the TiO2(B) variety with only 5% of anatase. This quantification of the anatase/TiO2(B) ratio was deduced from Raman spectroscopy measurement. TEM analysis highlights the excellent crystallinity of the nanosized TiO2(B), crystallizing as 6 nm thin nanoribbons. These characteristics are essential in lithium batteries for a fast lithium ion solid state diffusion into the active material. In lithium batteries, the TiO2(B) nanoribbons exhibit a good capacity and an excellent rate capability (reversible capacity of 200 mA hg(-1) at C/3 rate (111 mA g(-1)), 100 mA h g(-1) at 15C rate (5030 mA g(-1)) for a 50% carbon black loaded electrode). The electrode formulation study highlights the importance of the electronic and ionic connection around the active particles. The cycleability of the nano-TiO2(B) is another interesting point with a capacity loss of 5% only, over 500 cycles at 3C.
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收藏
页码:8457 / 8464
页数:8
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