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Single-ion conducting polymer electrolyte
Single-ion conducting polymer electrolytes (SICPEs) are solid polymer electrolytes in which anions are immobilized, giving a cation transference number near 1, pursued mainly for solid-state lithium-metal batteries.
Single-line diagram
A single-line diagram, also called a one-line diagram, is a simplified drawing of an electrical power system that shows power flow with single lines and standard symbols.
Single-phase electric power
Single-phase electric power, abbreviated 1φ, is alternating current distribution in which all supply voltages vary in unison, serving homes and small buildings while three-phase systems serve industrial loads.
Singlet fission
Singlet fission is a photophysical process where one excited singlet molecule splits into two triplet states, potentially lifting solar cell efficiency past the Shockley–Queisser limit to about 45%.
Singlet fission sensitization of silicon solar cells
Singlet fission sensitization of silicon solar cells places an organic layer that splits one photon's energy into two excitons on silicon, potentially raising its efficiency limit from 29.4% to 34.6%.
Singlet fission solar cells
Singlet fission solar cells are photovoltaic devices that use singlet fission to convert one photon into two charge carriers, pursued mainly as an add-on to silicon cells.
Singrauli Super Thermal Power Station
Singrauli Super Thermal Power Station is a 2,000 MW coal-fired NTPC power station at Shaktinagar in Sonebhadra district, Uttar Pradesh, whose first unit began generating in 1982.
Sini Oil and Gas Field
The Sini Oil and Gas Field is an onshore field in Tabasco, Mexico, discovered in 2012 and operated by Petróleos Mexicanos (Pemex), producing super light crude oil and wet gas.
Sino-Myanmar Oil Pipeline
The Sino-Myanmar Oil Pipeline (中缅原油管道) is a crude oil pipeline running from Maday Island at Kyaukphyu, Myanmar, to Kunming in China's Yunnan province, opened commercially in 2017.
Sinoma Lithium Battery Separator (Zhongcai Lithium Film)
Sinoma Lithium Battery Separator (中材锂膜) is a Chinese maker of wet-process lithium battery separators, founded in 2016 as a subsidiary of Sinoma Science & Technology.
Sinopec
Sinopec, formally China Petroleum & Chemical Corporation, is a Chinese state-owned energy company, the world's largest oil refiner, ranked sixth in the 2025 Fortune Global 500.
Sinusoidal pulse-width modulation
Sinusoidal pulse-width modulation is a modulation technique that controls a DC-AC inverter by comparing a sinusoidal reference with a high-frequency triangular carrier, reducing output harmonics.
Sion Power
Sion Power Corporation is a privately held battery developer in Tucson, Arizona, founded in 1989, that makes Licerion lithium-metal cells, now aimed mainly at defense and aerospace.
Sioux Power Plant
The Sioux Power Plant, also called the Sioux Energy Center, is a 1,099-megawatt coal-fired power station in West Alton, Missouri, whose two units went online in 1967 and 1968.
Sipat power station
Sipat power station, or Sipat Super Thermal Power Station, is a 2,980 MW coal-fired power station operated by NTPC at Sipat in Bilaspur district, Chhattisgarh, India.
Sirajgonj power station
Sirajgonj power station is a group of gas-fired combined cycle plants at Soydabad in Sirajganj District, Bangladesh, on the Jamuna River about 135 km northwest of Dhaka.
Sirdaryo power station
The Sirdaryo power station, also known as Syrdarya TPP, is a gas-fired thermal plant located in Shirin, Uzbekistan. Built 1972–1981, it is the largest facility in the country.
Sirikit Oil and Gas Field
The Sirikit Oil and Gas Field, also called S1, is Thailand's largest onshore oil field, discovered in 1981 and producing since 1982 in Kamphaeng Phet Province.
Sirri C Oil Field
Sirri C Oil Field, also known as Sirri Civand, is an offshore oil field in the Persian Gulf southwest of Sirri Island, Iran, producing since 1978.
Sisi-Nubi Oil Field
Sisi-Nubi is a pair of offshore gas and condensate fields about 25 kilometers off the Mahakam Delta in East Kalimantan, Indonesia, producing gas since 2007.
Sistema Nacional de Gasoductos (SNG)
The Sistema Nacional de Gasoductos (SNG) is Mexico's core natural gas transmission network, a roughly 8,582-kilometer pipeline system operated by CENAGAS and serving industrial, electric, and distribution users.
Sitio Royalties Corp.
Sitio Royalties Corp. was a Denver-based oil and gas mineral and royalty company focused on the Permian Basin, traded on the NYSE as STR until Viper Energy acquired it in 2025.
Sitra Oil and Gas Field
The Sitra Oil and Gas Field is a producing oil and gas field in Egypt's north Western Desert, discovered in 1982 with its main Sitra 8 block.
Six-factor formula
The six-factor formula is an equation in nuclear reactor physics that gives a thermal reactor's effective multiplication factor as the product of six factors covering a neutron generation's life cycle.
Sizewell
Sizewell is a coastal site in Suffolk, England, hosting three nuclear power stations: the decommissioned Sizewell A, operating Sizewell B, and the twin-reactor Sizewell C under construction.
Sizewell nuclear power plant
The Sizewell nuclear power plant is a site on the North Sea coast of Suffolk, England, hosting the operating Sizewell B reactor and the Sizewell C project.
Skaland
Skaland is a Norwegian flake graphite mining company, Skaland Graphite AS, based on Senja in Troms, northern Norway, described as Europe's leading producer of crystalline flake graphite.
Skarv field
Skarv is an oil and gas field in the Norwegian Sea, discovered in 1998 and produced through an FPSO vessel by operator Aker BP since 2012.
Skarv Oil and Gas Field
Skarv is an oil and gas field in the northern Norwegian Sea, discovered in 1998, producing since 2013 and operated by Aker BP via a floating production vessel.
Skhidno-Poltavske Gas Field
Skhidno-Poltavske (Східно-Полтавське), the "Eastern Poltava" field, is an onshore gas field in Poltava Oblast, Ukraine, operated by Ukrgasvydobuvannya and producing over 2 million m³ per day.