I think the options either that combination are limited. IKEA Zigbee devices use removable batteries, but they don’t have a temperature sensor. They do have a USB air quality sensor but it’s a bit more complex/expensive.
There are some good WiFi, Bluetooth or RF options with removable batteries but they won’t be Zigbee.
I’ve heard of some people modifying the coin cell devices to used a wired power supply, maybe that would be an option.

Unfortunately many parts of Sailfish are proprietary though.