A high-rate and long cycle life aqueous electrolyte battery for grid-scale energy storage

Pasta, Mauro; Wessells, Colin D.; Huggins, Robert A.; Cui, Yi

doi:10.1038/ncomms2139

Cited by 533 publications

(398 citation statements)

References 32 publications

(44 reference statements)

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“…Considering these requirements, we have selected solid CuHCF as the positive electrode for the TREC because of its negative temperature coefficient ( À 0.36 mV K À 1 ), high specific charge capacity (60 mAh g À 1 ) compared with redox couples in solution, relatively low specific heat (1.07 JK À 1 g À 1 ), and ultra-low voltage hysteresis [19][20][21] to 70°C. Figure 2a shows the OCV change of the CuHCF electrode (50% state of charge), the Cu/Cu 2 þ (3 M) electrode and the full cell for each 10-°C increment when the voltage is set at 0 V at 10°C.…”

Section: Resultsmentioning

confidence: 99%

An electrochemical system for efficiently harvesting low-grade heat energy

et al. 2014

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Efficient and low-cost thermal energy-harvesting systems are needed to utilize the tremendous low-grade heat sources. Although thermoelectric devices are attractive, its efficiency is limited by the relatively low figure-of-merit and low-temperature differential. An alternative approach is to explore thermodynamic cycles. Thermogalvanic effect, the dependence of electrode potential on temperature, can construct such cycles. In one cycle, an electrochemical cell is charged at a temperature and then discharged at a different temperature with higher cell voltage, thereby converting heat to electricity. Here we report an electrochemical system using a copper hexacyanoferrate cathode and a Cu/Cu 2 þ anode to convert heat into electricity. The electrode materials have low polarization, high charge capacity, moderate temperature coefficients and low specific heat. These features lead to a high heat-to-electricity energy conversion efficiency of 5.7% when cycled between 10 and 60°C, opening a promising way to utilize low-grade heat.

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Section: Resultsmentioning

confidence: 99%

An electrochemical system for efficiently harvesting low-grade heat energy

et al. 2014

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“…Among the various energy storage technologies, electrochemical approach represents one of the most promising means to store electricity in large-scale because of the flexibility, high energy conversion efficiency and simple maintenance [2][3][4] . Because of the highest energy density among practical rechargeable batteries, lithium-ion batteries have been widely used in portable electronic devices and would undoubtedly be the best choice for (hybrid) electric vehicles 5,6 .…”

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confidence: 99%

A zero-strain layered metal oxide as the negative electrode for long-life sodium-ion batteries

et al. 2013

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Room-temperature sodium-ion batteries have shown great promise in large-scale energy storage applications for renewable energy and smart grid because of the abundant sodium resources and low cost. Although many interesting positive electrode materials with acceptable performance have been proposed, suitable negative electrode materials have not been identified and their development is quite challenging. Here we introduce a layered material, P2-Na 0.66 [Li 0.22 Ti 0.78 ]O 2 , as the negative electrode, which exhibits only B0.77% volume change during sodium insertion/extraction. The zero-strain characteristics ensure a potentially long cycle life. The electrode material also exhibits an average storage voltage of 0.75 V, a practical usable capacity of ca. 100 mAh g À 1 , and an apparent Na þ diffusion coefficient of 1 Â 10 À 10 cm À 2 s À 1 as well as the best cyclability for a negative electrode material in a half-cell reported to date. This contribution demonstrates that P2-Na 0.66 [Li 0.22 Ti 0.78 ]O 2 is a promising negative electrode material for the development of rechargeable long-life sodium-ion batteries.

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“…As a common cathode material, LiFePO 4 operating at low potentials (≈3.55 V vs. Li/Li + ) and preventing the presence of cathode electrolyte interphase was chosen. For the aqueous systems, state‐of‐the‐art Prussian Blue Analogues (PBAs)13, 14, 15 electrochemically grown as thin films were used. Some of PBAs were also tested in organic electrolytes.…”

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confidence: 99%