Storage performance of LiFePO₄nanoplates

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

“…TEM analysis revealed that the LFP nanowires grew along the c-axis, leading to facile Li + transport and a potentially high-rate response along the shortened b-and a-axis, while the carbon coating ensured adequate electrical conductivity and minimal aggregation throughout the electrode. LiFePO4/C/PPy Nanocrystals ~155 (0.1 C) ~155 (20) [438] LiFePO4/C Porous spheres 153 (0.1 C) ~150 (5) [439] LiFePO4/C Nanoparticles 126 (20 C) ~112 (1000) [440] LiFePO4/C Nanoplates ~165 (0.1 C) ~160 (50) [441] LiFePO4/C Nanocrystals ~160 (0.2 C) 158 (100) [442] LiFePO4/C Nanowires 150 (1 C) 146 (100) [392] LiFePO4/C Nanocomposite ~163 (0.1 C) 162 (100) [406] LiFePO4/C Nanoplates ~165 (0.1 C) ~165 (50) [402] LiFePO4/C Nanocomposite ~168 (0.1 C) ~160 (1100) [384] LiFePO4/C Nanorods ~160 (0.1 C) ~160 (30) [403] LiFePO4/CNT Nanocomposite ~160 (10 mA g -1 ) ~160 (10) [399] LiFePO4/GO Nanocomposite ~145 (1 C) ~145 (5) [443] LiFePO4/ZnO2 Particles ~140 (0.1 C) ~143 (100) [444] Li-ion performance (Fig. 32), was recorded over several discharge rates with a first discharge capacity of 169 mA h g -1 (between 2.5-4.3 V vs. Li/Li + ), and as much as 93 mA h g -1 at the high discharge rate of 10 C. Cycling of the LFP nanowires resulted in stable performance with 146 mA h g -1 obtained after 100 cycles at the C rate.…”

“…While the low-current performance of the LFP nanowires displays close to theoretical capacity (170 mA h g -1 ), further performance increases at high rates could potentially be sought by scaling the diameters of c-axis nanowires further, particularly as ionic and electronic transport in single crystalline LFP is governed by particle size [445], and through a quasi, two-dimensional movement along the b-c plane [446]. A high rate capability and appreciable cyclic stability is also found amongst nanoplate morphologies of LFP, whose unique nanostructuring results in diminishing b-axis dimensions conducive to Li + transport [402,440,441]. Therefore, the thickness of LFP nanoplates, together with the nature of their synthesis, is likely to heavily impact the electrochemical performance of LFP nanoplates.…”

“…Therefore, the thickness of LFP nanoplates, together with the nature of their synthesis, is likely to heavily impact the electrochemical performance of LFP nanoplates. Saravanan and co-workers [402,441] recently demonstrated the advantage of using nanoplate morphologies and compared the unique structuring to spindle and diamond-shaped LFP cathodes [402]. The LFP nanoplates were prepared by a solvothermal process (ethylene glycol) at 270 °C, using Fe(oxalate) as an iron precursor, LiH2PO4 as Li + and PO4 3°C sources, and D-gluconic acid, serving as carbon former.…”

Studies on Bare and Mg-doped LiCoO2 as a cathode material for Lithium ion Batteries

“…Commercial Lithium ion batteries (LIBs) consist of a LiCoO 2 [1] or LiMn 2 O 4 [2,3] LiNi 0.5 Mn 1.5 O 4 [4,5] or LiFePO 4 [6] and other cathode as cathodes [7] and Graphite as anode [8,9]. During the charging process, Li-ions are removed from the cathode and inserted in the anode and vice-versa during the discharging process.…”

Designing Nanocrystal Electrodes by Supercritical Fluid Process and Their Electrochemical Properties

“…This makes the SCFs a unique reaction medium for the preparation of organic-inorganic hybrid nanostructures. Progress in the size and morphology control of LiMPO 4 nanocrystals have opened up various LiFePO 4 nano structures such as irregular nanoparticles, nano rods, nano plates, nanowires and porous nanostructures and so on [33][34][35]. Organization of such nano scale building blocks into complex hierarchical architectures via self-assembly is of great interest, because of their size and shape dependent physical and chemical properties.…”