Abstract
Low temperature performance of LiFePO4/C cathode was remarkably improved by slight Mn-substitution. Electrochemical measurements showed that about 95% of the discharge capacity of LiFe0.98Mn0.02PO4/C cathode at 20°C was obtained at 0°C, compared to 85% of that of LiFePO4/C cathode. The LiFe0.98Mn0.02PO4/C sample also presented enhanced rate performance at −20°C with the discharge capacities of 124.4 mA h/g (0.1C), 99.8 mA h/g (1C), 80.7mAh/g (2C) and 70 mA h/g (5C), respectively, while pristine LiFePO4/C only delivered capacities of 120.5 mA h/g (0.1C), 90.7 mA h/g (1C), 70.4 mA h/g (2C) and 52.2 mA h/g (5C). Cyclic voltammetry measurements demonstrated an obvious improvement of the lithium insertion-extraction process of the LiFePO4/C cathode by slight Mn-substitution. The results of FSEM observation and electrical conductivity measurement indicated that slight Mn-substitution minimized the particle size of LiFe0.98Mn0.02PO4/C and also obviously improved the electrical conductivity of the compound, thus obviously enhances the interface reaction process on the cathode.
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Padhi A K, Nanjundoswamy K S, Goodenough J B. Phospho-olivines as positive-electrode materials for rechargeable lithium batteries. J Electrochem Soc, 1997, 144: 1188–1194
Yamada A, Chung S C, Hinokuma K. Optimized LiFePO4 for lithium battery cathodes. J Electrochem Soc, 2001, 148: A224–A229
Goodenough J B. Cathode materials: A personal perspective. J Power Sources, 2007, 174: 996–1000
Zaghib K, Charest P, Guerfi A, et al. Safe Li-ion polymer batteries for HEV applications. J Power Sources, 2004, 134: 124–129
Ravet N, Goodenough J B, Besner S, et al. Improved iron based cathode material. In: Nazri G A, Thackeray M, Ohzuku T, et al. Proceedings of the 196th ECS Meeting, 1999 Oct 17–22, Honolulu, Hawaii, Pennington: The Electrochemical Society Inc, 1999, 99: 127
Barker J, Saide M Y, Swoyer J L. Lithium iron(II) phospho-olivines prepared by a novel carbothermal reduction method. Electrochem Solid-State Lett, 2003, 6: A53–A55
Liao X Z, Ma Z F, He Y S, et al. Electrochemical behavior of LiFePO4/C cathode material for rechargeable lithium batteries. J Electrochem Soc, 2005, 152: A1969–A1973
Kim K, Jeong J H, Kim I J, et al. Carbon coatings with olive oil, soybean oil and butter on nano-LiFePO4. J Power Sources, 2007, 167: 524–528
Prosini P P, Carewska M, Scaccia S, et al. A new synthetic route for preparing LiFePO4 with enhanced electrochemical performance. J Electrochem Soc, 2002, 149: A886–A890
Wang B, Qiu Y, Ni S. Ultrafine LiFePO4 cathode materials synthesized by chemical reduction and lithiation method in alcohol solution. Solid State Ionics, 2007, 178: 843–847
Takahashi M, Tobishima S, Takei K, et al. Characterization of LiFePO4 as the cathode material for rechargeable lithium batteries. J Power Sources, 2001, 97–98: 508–511
Chung S Y, Bloking J T, Chiang Y M. Electronically conductive phospho-olivines as lithium storage electrodes. Nat Mater, 2002, 1: 123–128
Zhang S S, Xu K, Jow T R. An improved electrolyte for the LiFePO4 cathode working in a wide temperature range. J Power Sources, 2006, 159: 702–707
Smart M C, Ratnakumar B V, Whitcanack L D, et al. Improved low-temperature performance of lithium-ion cells with quaternary carbonatebased electrolytes. J Power Sources, 2003, 119–121: 349–358
Smart M C, Ratnakumar B V, Behar A, et al. Gel polymer electrolyte lithium-ion cells with improved low temperature performance. J Power Sources, 2007, 165: 535–543
Liao X Z, Ma Z F, Gong Q, et al. Low-temperature performance of LiFePO4/C cathode in a quaternary carbonate-based electrolyte. Electrochem Commun, 2008, 10: 691–694
Liao X Z, Ma Z F, Wang L, et al. A novel synthesis route for LiFePO4/C cathode materials for lithium-ion batteries. Electrochem Solid-State Lett, 2004, 7: A522–A525
Molenda J, Ojczyk W, Świerczek K, et al. Diffusional mechanism of deintercalation in LiFe1−y MnyPO4 cathode material. Solid State Ionics, 2006, 117: 2617–2624
Liu H, Li C, Zhang H P, et al. Kinetic study on LiFePO4/C nanocomposites synthesized by solid state technique. J Power Sources, 2006, 159: 717–720
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Zeng, L., Gong, Q., Liao, X. et al. Enhanced low-temperature performance of slight Mn-substituted LiFePO4/C cathode for lithium ion batteries. Chin. Sci. Bull. 56, 1262–1266 (2011). https://doi.org/10.1007/s11434-010-4097-0
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DOI: https://doi.org/10.1007/s11434-010-4097-0